[cfe] Remove language version from extensions tests

Change-Id: Ie380dda35cbf449669eb06d18cef284915dc748e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/239305
Reviewed-by: Jens Johansen <jensj@google.com>
Commit-Queue: Johnni Winther <johnniwinther@google.com>

pkg/front_end/testcases/extensions/ambiguous.dart

@@ -1,7 +1,7 @@
 // Copyright (c) 2020, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// @dart=2.9
+
 extension A on C {
   void method() {}
   int get getter => 42;

pkg/front_end/testcases/extensions/ambiguous.dart.textual_outline.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 extension A on C {
   void method() {}
   int get getter => 42;

pkg/front_end/testcases/extensions/ambiguous.dart.textual_outline_modelled.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 class C {}
 
 errors(C c) {}

pkg/front_end/testcases/extensions/ambiguous.dart.weak.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -150,21 +150,11 @@ import self as self;
 import "dart:core" as core;
 
 class C extends core::Object {
-  synthetic constructor •() → self::C*
+  synthetic constructor •() → self::C
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension A on self::C* {
+extension A on self::C {
   method method = self::A|method;
   tearoff method = self::A|get#method;
   get getter = self::A|get#getter;
@@ -174,7 +164,7 @@ extension A on self::C* {
   operator [] = self::A|[];
   set setter = self::A|set#setter;
 }
-extension B on self::C* {
+extension B on self::C {
   method method = self::B|method;
   tearoff method = self::B|get#method;
   get getter = self::B|get#getter;
@@ -184,33 +174,33 @@ extension B on self::C* {
   set setter = self::B|set#setter;
   set property = self::B|set#property;
 }
-static method A|method(lowered final self::C* #this) → void {}
-static method A|get#method(lowered final self::C* #this) → () →* void
+static method A|method(lowered final self::C #this) → void {}
+static method A|get#method(lowered final self::C #this) → () → void
   return () → void => self::A|method(#this);
-static method A|get#getter(lowered final self::C* #this) → core::int*
+static method A|get#getter(lowered final self::C #this) → core::int
   return 42;
-static method A|set#setter(lowered final self::C* #this, core::int* value) → void {}
-static method A|get#property(lowered final self::C* #this) → core::int*
+static method A|set#setter(lowered final self::C #this, core::int value) → void {}
+static method A|get#property(lowered final self::C #this) → core::int
   return 42;
-static method A|+(lowered final self::C* #this, core::int* i) → core::int*
+static method A|+(lowered final self::C #this, core::int i) → core::int
   return i;
-static method A|unary-(lowered final self::C* #this) → core::int*
+static method A|unary-(lowered final self::C #this) → core::int
   return 0;
-static method A|[](lowered final self::C* #this, core::int* i) → core::int*
+static method A|[](lowered final self::C #this, core::int i) → core::int
   return i;
-static method B|method(lowered final self::C* #this) → void {}
-static method B|get#method(lowered final self::C* #this) → () →* void
+static method B|method(lowered final self::C #this) → void {}
+static method B|get#method(lowered final self::C #this) → () → void
   return () → void => self::B|method(#this);
-static method B|get#getter(lowered final self::C* #this) → core::int*
+static method B|get#getter(lowered final self::C #this) → core::int
   return 42;
-static method B|set#setter(lowered final self::C* #this, core::int* value) → void {}
-static method B|set#property(lowered final self::C* #this, core::int* value) → void {}
-static method B|+(lowered final self::C* #this, core::int* i) → core::int*
+static method B|set#setter(lowered final self::C #this, core::int value) → void {}
+static method B|set#property(lowered final self::C #this, core::int value) → void {}
+static method B|+(lowered final self::C #this, core::int i) → core::int
   return i;
-static method B|unary-(lowered final self::C* #this) → core::int*
+static method B|unary-(lowered final self::C #this) → core::int
   return 0;
-static method B|[]=(lowered final self::C* #this, core::int* i, core::int* j) → void {}
-static method errors(self::C* c) → dynamic {
+static method B|[]=(lowered final self::C #this, core::int i, core::int j) → void {}
+static method errors(self::C c) → dynamic {
   invalid-expression "pkg/front_end/testcases/extensions/ambiguous.dart:28:5: Error: The method 'method' is defined in multiple extensions for 'C' and neither is more specific.
  - 'C' is from 'pkg/front_end/testcases/extensions/ambiguous.dart'.
 Try using an explicit extension application of the wanted extension or hiding unwanted extensions from scope.

pkg/front_end/testcases/extensions/ambiguous.dart.weak.modular.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -150,21 +150,11 @@ import self as self;
 import "dart:core" as core;
 
 class C extends core::Object {
-  synthetic constructor •() → self::C*
+  synthetic constructor •() → self::C
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension A on self::C* {
+extension A on self::C {
   method method = self::A|method;
   tearoff method = self::A|get#method;
   get getter = self::A|get#getter;
@@ -174,7 +164,7 @@ extension A on self::C* {
   operator [] = self::A|[];
   set setter = self::A|set#setter;
 }
-extension B on self::C* {
+extension B on self::C {
   method method = self::B|method;
   tearoff method = self::B|get#method;
   get getter = self::B|get#getter;
@@ -184,33 +174,33 @@ extension B on self::C* {
   set setter = self::B|set#setter;
   set property = self::B|set#property;
 }
-static method A|method(lowered final self::C* #this) → void {}
-static method A|get#method(lowered final self::C* #this) → () →* void
+static method A|method(lowered final self::C #this) → void {}
+static method A|get#method(lowered final self::C #this) → () → void
   return () → void => self::A|method(#this);
-static method A|get#getter(lowered final self::C* #this) → core::int*
+static method A|get#getter(lowered final self::C #this) → core::int
   return 42;
-static method A|set#setter(lowered final self::C* #this, core::int* value) → void {}
-static method A|get#property(lowered final self::C* #this) → core::int*
+static method A|set#setter(lowered final self::C #this, core::int value) → void {}
+static method A|get#property(lowered final self::C #this) → core::int
   return 42;
-static method A|+(lowered final self::C* #this, core::int* i) → core::int*
+static method A|+(lowered final self::C #this, core::int i) → core::int
   return i;
-static method A|unary-(lowered final self::C* #this) → core::int*
+static method A|unary-(lowered final self::C #this) → core::int
   return 0;
-static method A|[](lowered final self::C* #this, core::int* i) → core::int*
+static method A|[](lowered final self::C #this, core::int i) → core::int
   return i;
-static method B|method(lowered final self::C* #this) → void {}
-static method B|get#method(lowered final self::C* #this) → () →* void
+static method B|method(lowered final self::C #this) → void {}
+static method B|get#method(lowered final self::C #this) → () → void
   return () → void => self::B|method(#this);
-static method B|get#getter(lowered final self::C* #this) → core::int*
+static method B|get#getter(lowered final self::C #this) → core::int
   return 42;
-static method B|set#setter(lowered final self::C* #this, core::int* value) → void {}
-static method B|set#property(lowered final self::C* #this, core::int* value) → void {}
-static method B|+(lowered final self::C* #this, core::int* i) → core::int*
+static method B|set#setter(lowered final self::C #this, core::int value) → void {}
+static method B|set#property(lowered final self::C #this, core::int value) → void {}
+static method B|+(lowered final self::C #this, core::int i) → core::int
   return i;
-static method B|unary-(lowered final self::C* #this) → core::int*
+static method B|unary-(lowered final self::C #this) → core::int
   return 0;
-static method B|[]=(lowered final self::C* #this, core::int* i, core::int* j) → void {}
-static method errors(self::C* c) → dynamic {
+static method B|[]=(lowered final self::C #this, core::int i, core::int j) → void {}
+static method errors(self::C c) → dynamic {
   invalid-expression "pkg/front_end/testcases/extensions/ambiguous.dart:28:5: Error: The method 'method' is defined in multiple extensions for 'C' and neither is more specific.
  - 'C' is from 'pkg/front_end/testcases/extensions/ambiguous.dart'.
 Try using an explicit extension application of the wanted extension or hiding unwanted extensions from scope.

pkg/front_end/testcases/extensions/ambiguous.dart.weak.outline.expect

@@ -1,22 +1,12 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 class C extends core::Object {
-  synthetic constructor •() → self::C*
+  synthetic constructor •() → self::C
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension A on self::C* {
+extension A on self::C {
   method method = self::A|method;
   tearoff method = self::A|get#method;
   get getter = self::A|get#getter;
@@ -26,7 +16,7 @@ extension A on self::C* {
   operator [] = self::A|[];
   set setter = self::A|set#setter;
 }
-extension B on self::C* {
+extension B on self::C {
   method method = self::B|method;
   tearoff method = self::B|get#method;
   get getter = self::B|get#getter;
@@ -36,39 +26,39 @@ extension B on self::C* {
   set setter = self::B|set#setter;
   set property = self::B|set#property;
 }
-static method A|method(lowered final self::C* #this) → void
+static method A|method(lowered final self::C #this) → void
   ;
-static method A|get#method(lowered final self::C* #this) → () →* void
+static method A|get#method(lowered final self::C #this) → () → void
   return () → void => self::A|method(#this);
-static method A|get#getter(lowered final self::C* #this) → core::int*
+static method A|get#getter(lowered final self::C #this) → core::int
   ;
-static method A|set#setter(lowered final self::C* #this, core::int* value) → void
+static method A|set#setter(lowered final self::C #this, core::int value) → void
   ;
-static method A|get#property(lowered final self::C* #this) → core::int*
+static method A|get#property(lowered final self::C #this) → core::int
   ;
-static method A|+(lowered final self::C* #this, core::int* i) → core::int*
+static method A|+(lowered final self::C #this, core::int i) → core::int
   ;
-static method A|unary-(lowered final self::C* #this) → core::int*
+static method A|unary-(lowered final self::C #this) → core::int
   ;
-static method A|[](lowered final self::C* #this, core::int* i) → core::int*
+static method A|[](lowered final self::C #this, core::int i) → core::int
   ;
-static method B|method(lowered final self::C* #this) → void
+static method B|method(lowered final self::C #this) → void
   ;
-static method B|get#method(lowered final self::C* #this) → () →* void
+static method B|get#method(lowered final self::C #this) → () → void
   return () → void => self::B|method(#this);
-static method B|get#getter(lowered final self::C* #this) → core::int*
+static method B|get#getter(lowered final self::C #this) → core::int
   ;
-static method B|set#setter(lowered final self::C* #this, core::int* value) → void
+static method B|set#setter(lowered final self::C #this, core::int value) → void
   ;
-static method B|set#property(lowered final self::C* #this, core::int* value) → void
+static method B|set#property(lowered final self::C #this, core::int value) → void
   ;
-static method B|+(lowered final self::C* #this, core::int* i) → core::int*
+static method B|+(lowered final self::C #this, core::int i) → core::int
   ;
-static method B|unary-(lowered final self::C* #this) → core::int*
+static method B|unary-(lowered final self::C #this) → core::int
   ;
-static method B|[]=(lowered final self::C* #this, core::int* i, core::int* j) → void
+static method B|[]=(lowered final self::C #this, core::int i, core::int j) → void
   ;
-static method errors(self::C* c) → dynamic
+static method errors(self::C c) → dynamic
   ;
 static method main() → dynamic
   ;

pkg/front_end/testcases/extensions/ambiguous.dart.weak.transformed.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -150,21 +150,11 @@ import self as self;
 import "dart:core" as core;
 
 class C extends core::Object {
-  synthetic constructor •() → self::C*
+  synthetic constructor •() → self::C
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension A on self::C* {
+extension A on self::C {
   method method = self::A|method;
   tearoff method = self::A|get#method;
   get getter = self::A|get#getter;
@@ -174,7 +164,7 @@ extension A on self::C* {
   operator [] = self::A|[];
   set setter = self::A|set#setter;
 }
-extension B on self::C* {
+extension B on self::C {
   method method = self::B|method;
   tearoff method = self::B|get#method;
   get getter = self::B|get#getter;
@@ -184,33 +174,33 @@ extension B on self::C* {
   set setter = self::B|set#setter;
   set property = self::B|set#property;
 }
-static method A|method(lowered final self::C* #this) → void {}
-static method A|get#method(lowered final self::C* #this) → () →* void
+static method A|method(lowered final self::C #this) → void {}
+static method A|get#method(lowered final self::C #this) → () → void
   return () → void => self::A|method(#this);
-static method A|get#getter(lowered final self::C* #this) → core::int*
+static method A|get#getter(lowered final self::C #this) → core::int
   return 42;
-static method A|set#setter(lowered final self::C* #this, core::int* value) → void {}
-static method A|get#property(lowered final self::C* #this) → core::int*
+static method A|set#setter(lowered final self::C #this, core::int value) → void {}
+static method A|get#property(lowered final self::C #this) → core::int
   return 42;
-static method A|+(lowered final self::C* #this, core::int* i) → core::int*
+static method A|+(lowered final self::C #this, core::int i) → core::int
   return i;
-static method A|unary-(lowered final self::C* #this) → core::int*
+static method A|unary-(lowered final self::C #this) → core::int
   return 0;
-static method A|[](lowered final self::C* #this, core::int* i) → core::int*
+static method A|[](lowered final self::C #this, core::int i) → core::int
   return i;
-static method B|method(lowered final self::C* #this) → void {}
-static method B|get#method(lowered final self::C* #this) → () →* void
+static method B|method(lowered final self::C #this) → void {}
+static method B|get#method(lowered final self::C #this) → () → void
   return () → void => self::B|method(#this);
-static method B|get#getter(lowered final self::C* #this) → core::int*
+static method B|get#getter(lowered final self::C #this) → core::int
   return 42;
-static method B|set#setter(lowered final self::C* #this, core::int* value) → void {}
-static method B|set#property(lowered final self::C* #this, core::int* value) → void {}
-static method B|+(lowered final self::C* #this, core::int* i) → core::int*
+static method B|set#setter(lowered final self::C #this, core::int value) → void {}
+static method B|set#property(lowered final self::C #this, core::int value) → void {}
+static method B|+(lowered final self::C #this, core::int i) → core::int
   return i;
-static method B|unary-(lowered final self::C* #this) → core::int*
+static method B|unary-(lowered final self::C #this) → core::int
   return 0;
-static method B|[]=(lowered final self::C* #this, core::int* i, core::int* j) → void {}
-static method errors(self::C* c) → dynamic {
+static method B|[]=(lowered final self::C #this, core::int i, core::int j) → void {}
+static method errors(self::C c) → dynamic {
   invalid-expression "pkg/front_end/testcases/extensions/ambiguous.dart:28:5: Error: The method 'method' is defined in multiple extensions for 'C' and neither is more specific.
  - 'C' is from 'pkg/front_end/testcases/extensions/ambiguous.dart'.
 Try using an explicit extension application of the wanted extension or hiding unwanted extensions from scope.

pkg/front_end/testcases/extensions/annotations.dart

@@ -2,8 +2,6 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-// @dart=2.9
-
 class Class {
   @pragma('dart2js:noInline')
   instanceMethod() {}

pkg/front_end/testcases/extensions/annotations.dart.textual_outline.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 class Class {
   @pragma('dart2js:noInline')
   instanceMethod() {}

pkg/front_end/testcases/extensions/annotations.dart.textual_outline_modelled.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 class Class {
   @pragma('dart2js:noInline')
   instanceMethod() {}

pkg/front_end/testcases/extensions/annotations.dart.weak.expect

@@ -1,34 +1,24 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 class Class extends core::Object {
-  synthetic constructor •() → self::Class*
+  synthetic constructor •() → self::Class
     : super core::Object::•()
     ;
   @#C3
   method instanceMethod() → dynamic {}
   @#C3
   static method staticMethod() → dynamic {}
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension Extension on self::Class* {
+extension Extension on self::Class {
   method extensionInstanceMethod = self::Extension|extensionInstanceMethod;
   tearoff extensionInstanceMethod = self::Extension|get#extensionInstanceMethod;
   static method extensionStaticMethod = self::Extension|extensionStaticMethod;
 }
 @#C3
-static method Extension|extensionInstanceMethod(lowered final self::Class* #this) → dynamic {}
-static method Extension|get#extensionInstanceMethod(lowered final self::Class* #this) → () →* dynamic
+static method Extension|extensionInstanceMethod(lowered final self::Class #this) → dynamic {}
+static method Extension|get#extensionInstanceMethod(lowered final self::Class #this) → () → dynamic
   return () → dynamic => self::Extension|extensionInstanceMethod(#this);
 @#C3
 static method Extension|extensionStaticMethod() → dynamic {}

pkg/front_end/testcases/extensions/annotations.dart.weak.modular.expect

@@ -1,34 +1,24 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 class Class extends core::Object {
-  synthetic constructor •() → self::Class*
+  synthetic constructor •() → self::Class
     : super core::Object::•()
     ;
   @#C3
   method instanceMethod() → dynamic {}
   @#C3
   static method staticMethod() → dynamic {}
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension Extension on self::Class* {
+extension Extension on self::Class {
   method extensionInstanceMethod = self::Extension|extensionInstanceMethod;
   tearoff extensionInstanceMethod = self::Extension|get#extensionInstanceMethod;
   static method extensionStaticMethod = self::Extension|extensionStaticMethod;
 }
 @#C3
-static method Extension|extensionInstanceMethod(lowered final self::Class* #this) → dynamic {}
-static method Extension|get#extensionInstanceMethod(lowered final self::Class* #this) → () →* dynamic
+static method Extension|extensionInstanceMethod(lowered final self::Class #this) → dynamic {}
+static method Extension|get#extensionInstanceMethod(lowered final self::Class #this) → () → dynamic
   return () → dynamic => self::Extension|extensionInstanceMethod(#this);
 @#C3
 static method Extension|extensionStaticMethod() → dynamic {}

pkg/front_end/testcases/extensions/annotations.dart.weak.outline.expect

@@ -1,9 +1,9 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 class Class extends core::Object {
-  synthetic constructor •() → self::Class*
+  synthetic constructor •() → self::Class
     ;
   @core::pragma::_("dart2js:noInline")
   method instanceMethod() → dynamic
@@ -11,26 +11,16 @@ class Class extends core::Object {
   @core::pragma::_("dart2js:noInline")
   static method staticMethod() → dynamic
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension Extension on self::Class* {
+extension Extension on self::Class {
   method extensionInstanceMethod = self::Extension|extensionInstanceMethod;
   tearoff extensionInstanceMethod = self::Extension|get#extensionInstanceMethod;
   static method extensionStaticMethod = self::Extension|extensionStaticMethod;
 }
 @core::pragma::_("dart2js:noInline")
-static method Extension|extensionInstanceMethod(lowered final self::Class* #this) → dynamic
+static method Extension|extensionInstanceMethod(lowered final self::Class #this) → dynamic
   ;
-static method Extension|get#extensionInstanceMethod(lowered final self::Class* #this) → () →* dynamic
+static method Extension|get#extensionInstanceMethod(lowered final self::Class #this) → () → dynamic
   return () → dynamic => self::Extension|extensionInstanceMethod(#this);
 @core::pragma::_("dart2js:noInline")
 static method Extension|extensionStaticMethod() → dynamic
@@ -43,9 +33,9 @@ static method main() → dynamic
 
 
 Extra constant evaluation status:
-Evaluated: ConstructorInvocation @ org-dartlang-testcase:///annotations.dart:8:4 -> InstanceConstant(const pragma{pragma.name: "dart2js:noInline", pragma.options: null})
-Evaluated: ConstructorInvocation @ org-dartlang-testcase:///annotations.dart:11:4 -> InstanceConstant(const pragma{pragma.name: "dart2js:noInline", pragma.options: null})
-Evaluated: ConstructorInvocation @ org-dartlang-testcase:///annotations.dart:16:4 -> InstanceConstant(const pragma{pragma.name: "dart2js:noInline", pragma.options: null})
-Evaluated: ConstructorInvocation @ org-dartlang-testcase:///annotations.dart:19:4 -> InstanceConstant(const pragma{pragma.name: "dart2js:noInline", pragma.options: null})
-Evaluated: ConstructorInvocation @ org-dartlang-testcase:///annotations.dart:23:2 -> InstanceConstant(const pragma{pragma.name: "dart2js:noInline", pragma.options: null})
+Evaluated: ConstructorInvocation @ org-dartlang-testcase:///annotations.dart:6:4 -> InstanceConstant(const pragma{pragma.name: "dart2js:noInline", pragma.options: null})
+Evaluated: ConstructorInvocation @ org-dartlang-testcase:///annotations.dart:9:4 -> InstanceConstant(const pragma{pragma.name: "dart2js:noInline", pragma.options: null})
+Evaluated: ConstructorInvocation @ org-dartlang-testcase:///annotations.dart:14:4 -> InstanceConstant(const pragma{pragma.name: "dart2js:noInline", pragma.options: null})
+Evaluated: ConstructorInvocation @ org-dartlang-testcase:///annotations.dart:17:4 -> InstanceConstant(const pragma{pragma.name: "dart2js:noInline", pragma.options: null})
+Evaluated: ConstructorInvocation @ org-dartlang-testcase:///annotations.dart:21:2 -> InstanceConstant(const pragma{pragma.name: "dart2js:noInline", pragma.options: null})
 Extra constant evaluation: evaluated: 8, effectively constant: 5

pkg/front_end/testcases/extensions/annotations.dart.weak.transformed.expect

@@ -1,34 +1,24 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 class Class extends core::Object {
-  synthetic constructor •() → self::Class*
+  synthetic constructor •() → self::Class
     : super core::Object::•()
     ;
   @#C3
   method instanceMethod() → dynamic {}
   @#C3
   static method staticMethod() → dynamic {}
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension Extension on self::Class* {
+extension Extension on self::Class {
   method extensionInstanceMethod = self::Extension|extensionInstanceMethod;
   tearoff extensionInstanceMethod = self::Extension|get#extensionInstanceMethod;
   static method extensionStaticMethod = self::Extension|extensionStaticMethod;
 }
 @#C3
-static method Extension|extensionInstanceMethod(lowered final self::Class* #this) → dynamic {}
-static method Extension|get#extensionInstanceMethod(lowered final self::Class* #this) → () →* dynamic
+static method Extension|extensionInstanceMethod(lowered final self::Class #this) → dynamic {}
+static method Extension|get#extensionInstanceMethod(lowered final self::Class #this) → () → dynamic
   return () → dynamic => self::Extension|extensionInstanceMethod(#this);
 @#C3
 static method Extension|extensionStaticMethod() → dynamic {}

pkg/front_end/testcases/extensions/async_extensions.dart

@@ -1,7 +1,7 @@
 // Copyright (c) 2020, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// @dart=2.9
+
 extension Extension on int {
   syncStarMethod() sync* {}
   asyncMethod() async {}

pkg/front_end/testcases/extensions/async_extensions.dart.textual_outline.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 extension Extension on int {
   syncStarMethod() sync* {}
   asyncMethod() async {}

pkg/front_end/testcases/extensions/async_extensions.dart.textual_outline_modelled.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 extension Extension on int {
   asyncMethod() async {}
   asyncStarMethod() async* {}

pkg/front_end/testcases/extensions/async_extensions.dart.weak.expect

@@ -1,8 +1,8 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
-extension Extension on core::int* {
+extension Extension on core::int {
   method syncStarMethod = self::Extension|syncStarMethod;
   tearoff syncStarMethod = self::Extension|get#syncStarMethod;
   method asyncMethod = self::Extension|asyncMethod;
@@ -10,14 +10,14 @@ extension Extension on core::int* {
   method asyncStarMethod = self::Extension|asyncStarMethod;
   tearoff asyncStarMethod = self::Extension|get#asyncStarMethod;
 }
-static method Extension|syncStarMethod(lowered final core::int* #this) → dynamic sync* {}
-static method Extension|get#syncStarMethod(lowered final core::int* #this) → () →* dynamic
+static method Extension|syncStarMethod(lowered final core::int #this) → dynamic sync* {}
+static method Extension|get#syncStarMethod(lowered final core::int #this) → () → dynamic
   return () → dynamic => self::Extension|syncStarMethod(#this);
-static method Extension|asyncMethod(lowered final core::int* #this) → dynamic async /* futureValueType= dynamic */ {}
-static method Extension|get#asyncMethod(lowered final core::int* #this) → () →* dynamic
+static method Extension|asyncMethod(lowered final core::int #this) → dynamic async /* futureValueType= dynamic */ {}
+static method Extension|get#asyncMethod(lowered final core::int #this) → () → dynamic
   return () → dynamic => self::Extension|asyncMethod(#this);
-static method Extension|asyncStarMethod(lowered final core::int* #this) → dynamic async* {}
-static method Extension|get#asyncStarMethod(lowered final core::int* #this) → () →* dynamic
+static method Extension|asyncStarMethod(lowered final core::int #this) → dynamic async* {}
+static method Extension|get#asyncStarMethod(lowered final core::int #this) → () → dynamic
   return () → dynamic => self::Extension|asyncStarMethod(#this);
 static method main() → dynamic {
   self::Extension|syncStarMethod(0);

pkg/front_end/testcases/extensions/async_extensions.dart.weak.modular.expect

@@ -1,8 +1,8 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
-extension Extension on core::int* {
+extension Extension on core::int {
   method syncStarMethod = self::Extension|syncStarMethod;
   tearoff syncStarMethod = self::Extension|get#syncStarMethod;
   method asyncMethod = self::Extension|asyncMethod;
@@ -10,14 +10,14 @@ extension Extension on core::int* {
   method asyncStarMethod = self::Extension|asyncStarMethod;
   tearoff asyncStarMethod = self::Extension|get#asyncStarMethod;
 }
-static method Extension|syncStarMethod(lowered final core::int* #this) → dynamic sync* {}
-static method Extension|get#syncStarMethod(lowered final core::int* #this) → () →* dynamic
+static method Extension|syncStarMethod(lowered final core::int #this) → dynamic sync* {}
+static method Extension|get#syncStarMethod(lowered final core::int #this) → () → dynamic
   return () → dynamic => self::Extension|syncStarMethod(#this);
-static method Extension|asyncMethod(lowered final core::int* #this) → dynamic async /* futureValueType= dynamic */ {}
-static method Extension|get#asyncMethod(lowered final core::int* #this) → () →* dynamic
+static method Extension|asyncMethod(lowered final core::int #this) → dynamic async /* futureValueType= dynamic */ {}
+static method Extension|get#asyncMethod(lowered final core::int #this) → () → dynamic
   return () → dynamic => self::Extension|asyncMethod(#this);
-static method Extension|asyncStarMethod(lowered final core::int* #this) → dynamic async* {}
-static method Extension|get#asyncStarMethod(lowered final core::int* #this) → () →* dynamic
+static method Extension|asyncStarMethod(lowered final core::int #this) → dynamic async* {}
+static method Extension|get#asyncStarMethod(lowered final core::int #this) → () → dynamic
   return () → dynamic => self::Extension|asyncStarMethod(#this);
 static method main() → dynamic {
   self::Extension|syncStarMethod(0);

pkg/front_end/testcases/extensions/async_extensions.dart.weak.outline.expect

@@ -1,8 +1,8 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
-extension Extension on core::int* {
+extension Extension on core::int {
   method syncStarMethod = self::Extension|syncStarMethod;
   tearoff syncStarMethod = self::Extension|get#syncStarMethod;
   method asyncMethod = self::Extension|asyncMethod;
@@ -10,17 +10,17 @@ extension Extension on core::int* {
   method asyncStarMethod = self::Extension|asyncStarMethod;
   tearoff asyncStarMethod = self::Extension|get#asyncStarMethod;
 }
-static method Extension|syncStarMethod(lowered final core::int* #this) → dynamic sync* 
+static method Extension|syncStarMethod(lowered final core::int #this) → dynamic sync* 
   ;
-static method Extension|get#syncStarMethod(lowered final core::int* #this) → () →* dynamic
+static method Extension|get#syncStarMethod(lowered final core::int #this) → () → dynamic
   return () → dynamic => self::Extension|syncStarMethod(#this);
-static method Extension|asyncMethod(lowered final core::int* #this) → dynamic async 
+static method Extension|asyncMethod(lowered final core::int #this) → dynamic async 
   ;
-static method Extension|get#asyncMethod(lowered final core::int* #this) → () →* dynamic
+static method Extension|get#asyncMethod(lowered final core::int #this) → () → dynamic
   return () → dynamic => self::Extension|asyncMethod(#this);
-static method Extension|asyncStarMethod(lowered final core::int* #this) → dynamic async* 
+static method Extension|asyncStarMethod(lowered final core::int #this) → dynamic async* 
   ;
-static method Extension|get#asyncStarMethod(lowered final core::int* #this) → () →* dynamic
+static method Extension|get#asyncStarMethod(lowered final core::int #this) → () → dynamic
   return () → dynamic => self::Extension|asyncStarMethod(#this);
 static method main() → dynamic
   ;

pkg/front_end/testcases/extensions/async_extensions.dart.weak.transformed.expect

@@ -1,9 +1,9 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
 
-extension Extension on core::int* {
+extension Extension on core::int {
   method syncStarMethod = self::Extension|syncStarMethod;
   tearoff syncStarMethod = self::Extension|get#syncStarMethod;
   method asyncMethod = self::Extension|asyncMethod;
@@ -11,11 +11,11 @@ extension Extension on core::int* {
   method asyncStarMethod = self::Extension|asyncStarMethod;
   tearoff asyncStarMethod = self::Extension|get#asyncStarMethod;
 }
-static method Extension|syncStarMethod(lowered final core::int* #this) → dynamic /* originally sync* */ {
-  function :sync_op_gen() → (core::_SyncIterator<dynamic>*, dynamic, dynamic) →* core::bool* {
-    core::int* :await_jump_var = 0;
+static method Extension|syncStarMethod(lowered final core::int #this) → dynamic /* originally sync* */ {
+  function :sync_op_gen() → (core::_SyncIterator<dynamic>?, dynamic, dynamic) → core::bool* {
+    core::int :await_jump_var = 0;
     dynamic :await_ctx_var;
-    function :sync_op(core::_SyncIterator<dynamic>* :iterator, dynamic :exception, dynamic :stack_trace) → core::bool* yielding {
+    function :sync_op(core::_SyncIterator<dynamic>? :iterator, dynamic :exception, dynamic :stack_trace) → core::bool* yielding {
       {}
       return false;
     }
@@ -23,15 +23,15 @@ static method Extension|syncStarMethod(lowered final core::int* #this) → dynam
   }
   return new core::_SyncIterable::•<dynamic>(:sync_op_gen);
 }
-static method Extension|get#syncStarMethod(lowered final core::int* #this) → () →* dynamic
+static method Extension|get#syncStarMethod(lowered final core::int #this) → () → dynamic
   return () → dynamic => self::Extension|syncStarMethod(#this);
-static method Extension|asyncMethod(lowered final core::int* #this) → dynamic /* futureValueType= dynamic */ /* originally async */ {
-  final asy::_Future<dynamic>* :async_future = new asy::_Future::•<dynamic>();
+static method Extension|asyncMethod(lowered final core::int #this) → dynamic /* futureValueType= dynamic */ /* originally async */ {
+  final asy::_Future<dynamic> :async_future = new asy::_Future::•<dynamic>();
   core::bool* :is_sync = false;
   dynamic :return_value;
-  (dynamic) →* dynamic :async_op_then;
-  (core::Object*, core::StackTrace*) →* dynamic :async_op_error;
-  core::int* :await_jump_var = 0;
+  (dynamic) → dynamic :async_op_then;
+  (core::Object, core::StackTrace) → dynamic :async_op_error;
+  core::int :await_jump_var = 0;
   dynamic :await_ctx_var;
   function :async_op(dynamic :result_or_exception, dynamic :stack_trace) → dynamic yielding 
     try {
@@ -40,23 +40,23 @@ static method Extension|asyncMethod(lowered final core::int* #this) → dynamic
       asy::_completeWithNoFutureOnAsyncReturn(:async_future, :return_value, :is_sync);
       return;
     }
-    on dynamic catch(dynamic exception, core::StackTrace* stack_trace) {
+    on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
       asy::_completeOnAsyncError(:async_future, exception, stack_trace, :is_sync);
     }
   :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
   :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
-  :async_op(null, null){() →* dynamic};
+  :async_op(null, null){() → dynamic};
   :is_sync = true;
   return :async_future;
 }
-static method Extension|get#asyncMethod(lowered final core::int* #this) → () →* dynamic
+static method Extension|get#asyncMethod(lowered final core::int #this) → () → dynamic
   return () → dynamic => self::Extension|asyncMethod(#this);
-static method Extension|asyncStarMethod(lowered final core::int* #this) → dynamic /* originally async* */ {
-  asy::_AsyncStarStreamController<dynamic>* :controller;
+static method Extension|asyncStarMethod(lowered final core::int #this) → dynamic /* originally async* */ {
+  asy::_AsyncStarStreamController<dynamic>? :controller;
   dynamic :controller_stream;
-  (dynamic) →* dynamic :async_op_then;
-  (core::Object*, core::StackTrace*) →* dynamic :async_op_error;
-  core::int* :await_jump_var = 0;
+  (dynamic) → dynamic :async_op_then;
+  (core::Object, core::StackTrace) → dynamic :async_op_error;
+  core::int :await_jump_var = 0;
   dynamic :await_ctx_var;
   function :async_op(dynamic :result_or_exception, dynamic :stack_trace) → dynamic yielding 
     try
@@ -65,7 +65,7 @@ static method Extension|asyncStarMethod(lowered final core::int* #this) → dyna
         {}
         return;
       }
-      on dynamic catch(dynamic exception, core::StackTrace* stack_trace) {
+      on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
         :controller.{asy::_AsyncStarStreamController::addError}(exception, stack_trace){(core::Object, core::StackTrace) → void};
       }
     finally {
@@ -77,7 +77,7 @@ static method Extension|asyncStarMethod(lowered final core::int* #this) → dyna
   :controller_stream = :controller.{asy::_AsyncStarStreamController::stream}{asy::Stream<dynamic>};
   return :controller_stream;
 }
-static method Extension|get#asyncStarMethod(lowered final core::int* #this) → () →* dynamic
+static method Extension|get#asyncStarMethod(lowered final core::int #this) → () → dynamic
   return () → dynamic => self::Extension|asyncStarMethod(#this);
 static method main() → dynamic {
   self::Extension|syncStarMethod(0);

pkg/front_end/testcases/extensions/bounds.dart

@@ -1,7 +1,7 @@
 // Copyright (c) 2020, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// @dart=2.9
+
 extension Extension1<T extends Object> on T {
   method1<S extends Object>() {}
   method2<S extends String>() {}

pkg/front_end/testcases/extensions/bounds.dart.textual_outline.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 extension Extension1<T extends Object> on T {
   method1<S extends Object>() {}
   method2<S extends String>() {}

pkg/front_end/testcases/extensions/bounds.dart.textual_outline_modelled.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 extension Extension1<T extends Object> on T {
   method1<S extends Object>() {}
   method2<S extends String>() {}

pkg/front_end/testcases/extensions/bounds.dart.weak.expect

@@ -1,8 +1,8 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
-extension Extension1<T extends core::Object*> on T* {
+extension Extension1<T extends core::Object> on T {
   method method1 = self::Extension1|method1;
   tearoff method1 = self::Extension1|get#method1;
   method method2 = self::Extension1|method2;
@@ -12,7 +12,7 @@ extension Extension1<T extends core::Object*> on T* {
   method method4 = self::Extension1|method4;
   tearoff method4 = self::Extension1|get#method4;
 }
-extension Extension2<T extends core::String*> on T* {
+extension Extension2<T extends core::String> on T {
   method method1 = self::Extension2|method1;
   tearoff method1 = self::Extension2|get#method1;
   method method2 = self::Extension2|method2;
@@ -22,7 +22,7 @@ extension Extension2<T extends core::String*> on T* {
   method method4 = self::Extension2|method4;
   tearoff method4 = self::Extension2|get#method4;
 }
-extension Extension3<T extends dynamic> on T* {
+extension Extension3<T extends dynamic> on T% {
   method method1 = self::Extension3|method1;
   tearoff method1 = self::Extension3|get#method1;
   method method2 = self::Extension3|method2;
@@ -32,7 +32,7 @@ extension Extension3<T extends dynamic> on T* {
   method method4 = self::Extension3|method4;
   tearoff method4 = self::Extension3|get#method4;
 }
-extension Extension4<T extends core::Object* = dynamic> on T* {
+extension Extension4<T extends core::Object? = dynamic> on T% {
   method method1 = self::Extension4|method1;
   tearoff method1 = self::Extension4|get#method1;
   method method2 = self::Extension4|method2;
@@ -42,52 +42,52 @@ extension Extension4<T extends core::Object* = dynamic> on T* {
   method method4 = self::Extension4|method4;
   tearoff method4 = self::Extension4|get#method4;
 }
-static method Extension1|method1<T extends core::Object*, S extends core::Object*>(lowered final self::Extension1|method1::T* #this) → dynamic {}
-static method Extension1|get#method1<T extends core::Object*>(lowered final self::Extension1|get#method1::T* #this) → <S extends core::Object*>() →* dynamic
-  return <S extends core::Object*>() → dynamic => self::Extension1|method1<self::Extension1|get#method1::T*, S*>(#this);
-static method Extension1|method2<T extends core::Object*, S extends core::String*>(lowered final self::Extension1|method2::T* #this) → dynamic {}
-static method Extension1|get#method2<T extends core::Object*>(lowered final self::Extension1|get#method2::T* #this) → <S extends core::String*>() →* dynamic
-  return <S extends core::String*>() → dynamic => self::Extension1|method2<self::Extension1|get#method2::T*, S*>(#this);
-static method Extension1|method3<T extends core::Object*, S extends dynamic>(lowered final self::Extension1|method3::T* #this) → dynamic {}
-static method Extension1|get#method3<T extends core::Object*>(lowered final self::Extension1|get#method3::T* #this) → <S extends dynamic>() →* dynamic
-  return <S extends dynamic>() → dynamic => self::Extension1|method3<self::Extension1|get#method3::T*, S%>(#this);
-static method Extension1|method4<T extends core::Object*, S extends core::Object* = dynamic>(lowered final self::Extension1|method4::T* #this) → dynamic {}
-static method Extension1|get#method4<T extends core::Object*>(lowered final self::Extension1|get#method4::T* #this) → <S extends core::Object* = dynamic>() →* dynamic
-  return <S extends core::Object* = dynamic>() → dynamic => self::Extension1|method4<self::Extension1|get#method4::T*, S*>(#this);
-static method Extension2|method1<T extends core::String*, S extends core::Object*>(lowered final self::Extension2|method1::T* #this) → dynamic {}
-static method Extension2|get#method1<T extends core::String*>(lowered final self::Extension2|get#method1::T* #this) → <S extends core::Object*>() →* dynamic
-  return <S extends core::Object*>() → dynamic => self::Extension2|method1<self::Extension2|get#method1::T*, S*>(#this);
-static method Extension2|method2<T extends core::String*, S extends core::String*>(lowered final self::Extension2|method2::T* #this) → dynamic {}
-static method Extension2|get#method2<T extends core::String*>(lowered final self::Extension2|get#method2::T* #this) → <S extends core::String*>() →* dynamic
-  return <S extends core::String*>() → dynamic => self::Extension2|method2<self::Extension2|get#method2::T*, S*>(#this);
-static method Extension2|method3<T extends core::String*, S extends dynamic>(lowered final self::Extension2|method3::T* #this) → dynamic {}
-static method Extension2|get#method3<T extends core::String*>(lowered final self::Extension2|get#method3::T* #this) → <S extends dynamic>() →* dynamic
-  return <S extends dynamic>() → dynamic => self::Extension2|method3<self::Extension2|get#method3::T*, S%>(#this);
-static method Extension2|method4<T extends core::String*, S extends core::Object* = dynamic>(lowered final self::Extension2|method4::T* #this) → dynamic {}
-static method Extension2|get#method4<T extends core::String*>(lowered final self::Extension2|get#method4::T* #this) → <S extends core::Object* = dynamic>() →* dynamic
-  return <S extends core::Object* = dynamic>() → dynamic => self::Extension2|method4<self::Extension2|get#method4::T*, S*>(#this);
-static method Extension3|method1<T extends dynamic, S extends core::Object*>(lowered final self::Extension3|method1::T* #this) → dynamic {}
-static method Extension3|get#method1<T extends dynamic>(lowered final self::Extension3|get#method1::T* #this) → <S extends core::Object*>() →* dynamic
-  return <S extends core::Object*>() → dynamic => self::Extension3|method1<self::Extension3|get#method1::T%, S*>(#this);
-static method Extension3|method2<T extends dynamic, S extends core::String*>(lowered final self::Extension3|method2::T* #this) → dynamic {}
-static method Extension3|get#method2<T extends dynamic>(lowered final self::Extension3|get#method2::T* #this) → <S extends core::String*>() →* dynamic
-  return <S extends core::String*>() → dynamic => self::Extension3|method2<self::Extension3|get#method2::T%, S*>(#this);
-static method Extension3|method3<T extends dynamic, S extends dynamic>(lowered final self::Extension3|method3::T* #this) → dynamic {}
-static method Extension3|get#method3<T extends dynamic>(lowered final self::Extension3|get#method3::T* #this) → <S extends dynamic>() →* dynamic
+static method Extension1|method1<T extends core::Object, S extends core::Object>(lowered final self::Extension1|method1::T #this) → dynamic {}
+static method Extension1|get#method1<T extends core::Object>(lowered final self::Extension1|get#method1::T #this) → <S extends core::Object>() → dynamic
+  return <S extends core::Object>() → dynamic => self::Extension1|method1<self::Extension1|get#method1::T, S>(#this);
+static method Extension1|method2<T extends core::Object, S extends core::String>(lowered final self::Extension1|method2::T #this) → dynamic {}
+static method Extension1|get#method2<T extends core::Object>(lowered final self::Extension1|get#method2::T #this) → <S extends core::String>() → dynamic
+  return <S extends core::String>() → dynamic => self::Extension1|method2<self::Extension1|get#method2::T, S>(#this);
+static method Extension1|method3<T extends core::Object, S extends dynamic>(lowered final self::Extension1|method3::T #this) → dynamic {}
+static method Extension1|get#method3<T extends core::Object>(lowered final self::Extension1|get#method3::T #this) → <S extends dynamic>() → dynamic
+  return <S extends dynamic>() → dynamic => self::Extension1|method3<self::Extension1|get#method3::T, S%>(#this);
+static method Extension1|method4<T extends core::Object, S extends core::Object? = dynamic>(lowered final self::Extension1|method4::T #this) → dynamic {}
+static method Extension1|get#method4<T extends core::Object>(lowered final self::Extension1|get#method4::T #this) → <S extends core::Object? = dynamic>() → dynamic
+  return <S extends core::Object? = dynamic>() → dynamic => self::Extension1|method4<self::Extension1|get#method4::T, S%>(#this);
+static method Extension2|method1<T extends core::String, S extends core::Object>(lowered final self::Extension2|method1::T #this) → dynamic {}
+static method Extension2|get#method1<T extends core::String>(lowered final self::Extension2|get#method1::T #this) → <S extends core::Object>() → dynamic
+  return <S extends core::Object>() → dynamic => self::Extension2|method1<self::Extension2|get#method1::T, S>(#this);
+static method Extension2|method2<T extends core::String, S extends core::String>(lowered final self::Extension2|method2::T #this) → dynamic {}
+static method Extension2|get#method2<T extends core::String>(lowered final self::Extension2|get#method2::T #this) → <S extends core::String>() → dynamic
+  return <S extends core::String>() → dynamic => self::Extension2|method2<self::Extension2|get#method2::T, S>(#this);
+static method Extension2|method3<T extends core::String, S extends dynamic>(lowered final self::Extension2|method3::T #this) → dynamic {}
+static method Extension2|get#method3<T extends core::String>(lowered final self::Extension2|get#method3::T #this) → <S extends dynamic>() → dynamic
+  return <S extends dynamic>() → dynamic => self::Extension2|method3<self::Extension2|get#method3::T, S%>(#this);
+static method Extension2|method4<T extends core::String, S extends core::Object? = dynamic>(lowered final self::Extension2|method4::T #this) → dynamic {}
+static method Extension2|get#method4<T extends core::String>(lowered final self::Extension2|get#method4::T #this) → <S extends core::Object? = dynamic>() → dynamic
+  return <S extends core::Object? = dynamic>() → dynamic => self::Extension2|method4<self::Extension2|get#method4::T, S%>(#this);
+static method Extension3|method1<T extends dynamic, S extends core::Object>(lowered final self::Extension3|method1::T% #this) → dynamic {}
+static method Extension3|get#method1<T extends dynamic>(lowered final self::Extension3|get#method1::T% #this) → <S extends core::Object>() → dynamic
+  return <S extends core::Object>() → dynamic => self::Extension3|method1<self::Extension3|get#method1::T%, S>(#this);
+static method Extension3|method2<T extends dynamic, S extends core::String>(lowered final self::Extension3|method2::T% #this) → dynamic {}
+static method Extension3|get#method2<T extends dynamic>(lowered final self::Extension3|get#method2::T% #this) → <S extends core::String>() → dynamic
+  return <S extends core::String>() → dynamic => self::Extension3|method2<self::Extension3|get#method2::T%, S>(#this);
+static method Extension3|method3<T extends dynamic, S extends dynamic>(lowered final self::Extension3|method3::T% #this) → dynamic {}
+static method Extension3|get#method3<T extends dynamic>(lowered final self::Extension3|get#method3::T% #this) → <S extends dynamic>() → dynamic
   return <S extends dynamic>() → dynamic => self::Extension3|method3<self::Extension3|get#method3::T%, S%>(#this);
-static method Extension3|method4<T extends dynamic, S extends core::Object* = dynamic>(lowered final self::Extension3|method4::T* #this) → dynamic {}
-static method Extension3|get#method4<T extends dynamic>(lowered final self::Extension3|get#method4::T* #this) → <S extends core::Object* = dynamic>() →* dynamic
-  return <S extends core::Object* = dynamic>() → dynamic => self::Extension3|method4<self::Extension3|get#method4::T%, S*>(#this);
-static method Extension4|method1<T extends core::Object* = dynamic, S extends core::Object*>(lowered final self::Extension4|method1::T* #this) → dynamic {}
-static method Extension4|get#method1<T extends core::Object* = dynamic>(lowered final self::Extension4|get#method1::T* #this) → <S extends core::Object*>() →* dynamic
-  return <S extends core::Object*>() → dynamic => self::Extension4|method1<self::Extension4|get#method1::T*, S*>(#this);
-static method Extension4|method2<T extends core::Object* = dynamic, S extends core::String*>(lowered final self::Extension4|method2::T* #this) → dynamic {}
-static method Extension4|get#method2<T extends core::Object* = dynamic>(lowered final self::Extension4|get#method2::T* #this) → <S extends core::String*>() →* dynamic
-  return <S extends core::String*>() → dynamic => self::Extension4|method2<self::Extension4|get#method2::T*, S*>(#this);
-static method Extension4|method3<T extends core::Object* = dynamic, S extends dynamic>(lowered final self::Extension4|method3::T* #this) → dynamic {}
-static method Extension4|get#method3<T extends core::Object* = dynamic>(lowered final self::Extension4|get#method3::T* #this) → <S extends dynamic>() →* dynamic
-  return <S extends dynamic>() → dynamic => self::Extension4|method3<self::Extension4|get#method3::T*, S%>(#this);
-static method Extension4|method4<T extends core::Object* = dynamic, S extends core::Object* = dynamic>(lowered final self::Extension4|method4::T* #this) → dynamic {}
-static method Extension4|get#method4<T extends core::Object* = dynamic>(lowered final self::Extension4|get#method4::T* #this) → <S extends core::Object* = dynamic>() →* dynamic
-  return <S extends core::Object* = dynamic>() → dynamic => self::Extension4|method4<self::Extension4|get#method4::T*, S*>(#this);
+static method Extension3|method4<T extends dynamic, S extends core::Object? = dynamic>(lowered final self::Extension3|method4::T% #this) → dynamic {}
+static method Extension3|get#method4<T extends dynamic>(lowered final self::Extension3|get#method4::T% #this) → <S extends core::Object? = dynamic>() → dynamic
+  return <S extends core::Object? = dynamic>() → dynamic => self::Extension3|method4<self::Extension3|get#method4::T%, S%>(#this);
+static method Extension4|method1<T extends core::Object? = dynamic, S extends core::Object>(lowered final self::Extension4|method1::T% #this) → dynamic {}
+static method Extension4|get#method1<T extends core::Object? = dynamic>(lowered final self::Extension4|get#method1::T% #this) → <S extends core::Object>() → dynamic
+  return <S extends core::Object>() → dynamic => self::Extension4|method1<self::Extension4|get#method1::T%, S>(#this);
+static method Extension4|method2<T extends core::Object? = dynamic, S extends core::String>(lowered final self::Extension4|method2::T% #this) → dynamic {}
+static method Extension4|get#method2<T extends core::Object? = dynamic>(lowered final self::Extension4|get#method2::T% #this) → <S extends core::String>() → dynamic
+  return <S extends core::String>() → dynamic => self::Extension4|method2<self::Extension4|get#method2::T%, S>(#this);
+static method Extension4|method3<T extends core::Object? = dynamic, S extends dynamic>(lowered final self::Extension4|method3::T% #this) → dynamic {}
+static method Extension4|get#method3<T extends core::Object? = dynamic>(lowered final self::Extension4|get#method3::T% #this) → <S extends dynamic>() → dynamic
+  return <S extends dynamic>() → dynamic => self::Extension4|method3<self::Extension4|get#method3::T%, S%>(#this);
+static method Extension4|method4<T extends core::Object? = dynamic, S extends core::Object? = dynamic>(lowered final self::Extension4|method4::T% #this) → dynamic {}
+static method Extension4|get#method4<T extends core::Object? = dynamic>(lowered final self::Extension4|get#method4::T% #this) → <S extends core::Object? = dynamic>() → dynamic
+  return <S extends core::Object? = dynamic>() → dynamic => self::Extension4|method4<self::Extension4|get#method4::T%, S%>(#this);
 static method main() → dynamic {}

pkg/front_end/testcases/extensions/bounds.dart.weak.modular.expect

@@ -1,8 +1,8 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
-extension Extension1<T extends core::Object*> on T* {
+extension Extension1<T extends core::Object> on T {
   method method1 = self::Extension1|method1;
   tearoff method1 = self::Extension1|get#method1;
   method method2 = self::Extension1|method2;
@@ -12,7 +12,7 @@ extension Extension1<T extends core::Object*> on T* {
   method method4 = self::Extension1|method4;
   tearoff method4 = self::Extension1|get#method4;
 }
-extension Extension2<T extends core::String*> on T* {
+extension Extension2<T extends core::String> on T {
   method method1 = self::Extension2|method1;
   tearoff method1 = self::Extension2|get#method1;
   method method2 = self::Extension2|method2;
@@ -22,7 +22,7 @@ extension Extension2<T extends core::String*> on T* {
   method method4 = self::Extension2|method4;
   tearoff method4 = self::Extension2|get#method4;
 }
-extension Extension3<T extends dynamic> on T* {
+extension Extension3<T extends dynamic> on T% {
   method method1 = self::Extension3|method1;
   tearoff method1 = self::Extension3|get#method1;
   method method2 = self::Extension3|method2;
@@ -32,7 +32,7 @@ extension Extension3<T extends dynamic> on T* {
   method method4 = self::Extension3|method4;
   tearoff method4 = self::Extension3|get#method4;
 }
-extension Extension4<T extends core::Object* = dynamic> on T* {
+extension Extension4<T extends core::Object? = dynamic> on T% {
   method method1 = self::Extension4|method1;
   tearoff method1 = self::Extension4|get#method1;
   method method2 = self::Extension4|method2;
@@ -42,52 +42,52 @@ extension Extension4<T extends core::Object* = dynamic> on T* {
   method method4 = self::Extension4|method4;
   tearoff method4 = self::Extension4|get#method4;
 }
-static method Extension1|method1<T extends core::Object*, S extends core::Object*>(lowered final self::Extension1|method1::T* #this) → dynamic {}
-static method Extension1|get#method1<T extends core::Object*>(lowered final self::Extension1|get#method1::T* #this) → <S extends core::Object*>() →* dynamic
-  return <S extends core::Object*>() → dynamic => self::Extension1|method1<self::Extension1|get#method1::T*, S*>(#this);
-static method Extension1|method2<T extends core::Object*, S extends core::String*>(lowered final self::Extension1|method2::T* #this) → dynamic {}
-static method Extension1|get#method2<T extends core::Object*>(lowered final self::Extension1|get#method2::T* #this) → <S extends core::String*>() →* dynamic
-  return <S extends core::String*>() → dynamic => self::Extension1|method2<self::Extension1|get#method2::T*, S*>(#this);
-static method Extension1|method3<T extends core::Object*, S extends dynamic>(lowered final self::Extension1|method3::T* #this) → dynamic {}
-static method Extension1|get#method3<T extends core::Object*>(lowered final self::Extension1|get#method3::T* #this) → <S extends dynamic>() →* dynamic
-  return <S extends dynamic>() → dynamic => self::Extension1|method3<self::Extension1|get#method3::T*, S%>(#this);
-static method Extension1|method4<T extends core::Object*, S extends core::Object* = dynamic>(lowered final self::Extension1|method4::T* #this) → dynamic {}
-static method Extension1|get#method4<T extends core::Object*>(lowered final self::Extension1|get#method4::T* #this) → <S extends core::Object* = dynamic>() →* dynamic
-  return <S extends core::Object* = dynamic>() → dynamic => self::Extension1|method4<self::Extension1|get#method4::T*, S*>(#this);
-static method Extension2|method1<T extends core::String*, S extends core::Object*>(lowered final self::Extension2|method1::T* #this) → dynamic {}
-static method Extension2|get#method1<T extends core::String*>(lowered final self::Extension2|get#method1::T* #this) → <S extends core::Object*>() →* dynamic
-  return <S extends core::Object*>() → dynamic => self::Extension2|method1<self::Extension2|get#method1::T*, S*>(#this);
-static method Extension2|method2<T extends core::String*, S extends core::String*>(lowered final self::Extension2|method2::T* #this) → dynamic {}
-static method Extension2|get#method2<T extends core::String*>(lowered final self::Extension2|get#method2::T* #this) → <S extends core::String*>() →* dynamic
-  return <S extends core::String*>() → dynamic => self::Extension2|method2<self::Extension2|get#method2::T*, S*>(#this);
-static method Extension2|method3<T extends core::String*, S extends dynamic>(lowered final self::Extension2|method3::T* #this) → dynamic {}
-static method Extension2|get#method3<T extends core::String*>(lowered final self::Extension2|get#method3::T* #this) → <S extends dynamic>() →* dynamic
-  return <S extends dynamic>() → dynamic => self::Extension2|method3<self::Extension2|get#method3::T*, S%>(#this);
-static method Extension2|method4<T extends core::String*, S extends core::Object* = dynamic>(lowered final self::Extension2|method4::T* #this) → dynamic {}
-static method Extension2|get#method4<T extends core::String*>(lowered final self::Extension2|get#method4::T* #this) → <S extends core::Object* = dynamic>() →* dynamic
-  return <S extends core::Object* = dynamic>() → dynamic => self::Extension2|method4<self::Extension2|get#method4::T*, S*>(#this);
-static method Extension3|method1<T extends dynamic, S extends core::Object*>(lowered final self::Extension3|method1::T* #this) → dynamic {}
-static method Extension3|get#method1<T extends dynamic>(lowered final self::Extension3|get#method1::T* #this) → <S extends core::Object*>() →* dynamic
-  return <S extends core::Object*>() → dynamic => self::Extension3|method1<self::Extension3|get#method1::T%, S*>(#this);
-static method Extension3|method2<T extends dynamic, S extends core::String*>(lowered final self::Extension3|method2::T* #this) → dynamic {}
-static method Extension3|get#method2<T extends dynamic>(lowered final self::Extension3|get#method2::T* #this) → <S extends core::String*>() →* dynamic
-  return <S extends core::String*>() → dynamic => self::Extension3|method2<self::Extension3|get#method2::T%, S*>(#this);
-static method Extension3|method3<T extends dynamic, S extends dynamic>(lowered final self::Extension3|method3::T* #this) → dynamic {}
-static method Extension3|get#method3<T extends dynamic>(lowered final self::Extension3|get#method3::T* #this) → <S extends dynamic>() →* dynamic
+static method Extension1|method1<T extends core::Object, S extends core::Object>(lowered final self::Extension1|method1::T #this) → dynamic {}
+static method Extension1|get#method1<T extends core::Object>(lowered final self::Extension1|get#method1::T #this) → <S extends core::Object>() → dynamic
+  return <S extends core::Object>() → dynamic => self::Extension1|method1<self::Extension1|get#method1::T, S>(#this);
+static method Extension1|method2<T extends core::Object, S extends core::String>(lowered final self::Extension1|method2::T #this) → dynamic {}
+static method Extension1|get#method2<T extends core::Object>(lowered final self::Extension1|get#method2::T #this) → <S extends core::String>() → dynamic
+  return <S extends core::String>() → dynamic => self::Extension1|method2<self::Extension1|get#method2::T, S>(#this);
+static method Extension1|method3<T extends core::Object, S extends dynamic>(lowered final self::Extension1|method3::T #this) → dynamic {}
+static method Extension1|get#method3<T extends core::Object>(lowered final self::Extension1|get#method3::T #this) → <S extends dynamic>() → dynamic
+  return <S extends dynamic>() → dynamic => self::Extension1|method3<self::Extension1|get#method3::T, S%>(#this);
+static method Extension1|method4<T extends core::Object, S extends core::Object? = dynamic>(lowered final self::Extension1|method4::T #this) → dynamic {}
+static method Extension1|get#method4<T extends core::Object>(lowered final self::Extension1|get#method4::T #this) → <S extends core::Object? = dynamic>() → dynamic
+  return <S extends core::Object? = dynamic>() → dynamic => self::Extension1|method4<self::Extension1|get#method4::T, S%>(#this);
+static method Extension2|method1<T extends core::String, S extends core::Object>(lowered final self::Extension2|method1::T #this) → dynamic {}
+static method Extension2|get#method1<T extends core::String>(lowered final self::Extension2|get#method1::T #this) → <S extends core::Object>() → dynamic
+  return <S extends core::Object>() → dynamic => self::Extension2|method1<self::Extension2|get#method1::T, S>(#this);
+static method Extension2|method2<T extends core::String, S extends core::String>(lowered final self::Extension2|method2::T #this) → dynamic {}
+static method Extension2|get#method2<T extends core::String>(lowered final self::Extension2|get#method2::T #this) → <S extends core::String>() → dynamic
+  return <S extends core::String>() → dynamic => self::Extension2|method2<self::Extension2|get#method2::T, S>(#this);
+static method Extension2|method3<T extends core::String, S extends dynamic>(lowered final self::Extension2|method3::T #this) → dynamic {}
+static method Extension2|get#method3<T extends core::String>(lowered final self::Extension2|get#method3::T #this) → <S extends dynamic>() → dynamic
+  return <S extends dynamic>() → dynamic => self::Extension2|method3<self::Extension2|get#method3::T, S%>(#this);
+static method Extension2|method4<T extends core::String, S extends core::Object? = dynamic>(lowered final self::Extension2|method4::T #this) → dynamic {}
+static method Extension2|get#method4<T extends core::String>(lowered final self::Extension2|get#method4::T #this) → <S extends core::Object? = dynamic>() → dynamic
+  return <S extends core::Object? = dynamic>() → dynamic => self::Extension2|method4<self::Extension2|get#method4::T, S%>(#this);
+static method Extension3|method1<T extends dynamic, S extends core::Object>(lowered final self::Extension3|method1::T% #this) → dynamic {}
+static method Extension3|get#method1<T extends dynamic>(lowered final self::Extension3|get#method1::T% #this) → <S extends core::Object>() → dynamic
+  return <S extends core::Object>() → dynamic => self::Extension3|method1<self::Extension3|get#method1::T%, S>(#this);
+static method Extension3|method2<T extends dynamic, S extends core::String>(lowered final self::Extension3|method2::T% #this) → dynamic {}
+static method Extension3|get#method2<T extends dynamic>(lowered final self::Extension3|get#method2::T% #this) → <S extends core::String>() → dynamic
+  return <S extends core::String>() → dynamic => self::Extension3|method2<self::Extension3|get#method2::T%, S>(#this);
+static method Extension3|method3<T extends dynamic, S extends dynamic>(lowered final self::Extension3|method3::T% #this) → dynamic {}
+static method Extension3|get#method3<T extends dynamic>(lowered final self::Extension3|get#method3::T% #this) → <S extends dynamic>() → dynamic
   return <S extends dynamic>() → dynamic => self::Extension3|method3<self::Extension3|get#method3::T%, S%>(#this);
-static method Extension3|method4<T extends dynamic, S extends core::Object* = dynamic>(lowered final self::Extension3|method4::T* #this) → dynamic {}
-static method Extension3|get#method4<T extends dynamic>(lowered final self::Extension3|get#method4::T* #this) → <S extends core::Object* = dynamic>() →* dynamic
-  return <S extends core::Object* = dynamic>() → dynamic => self::Extension3|method4<self::Extension3|get#method4::T%, S*>(#this);
-static method Extension4|method1<T extends core::Object* = dynamic, S extends core::Object*>(lowered final self::Extension4|method1::T* #this) → dynamic {}
-static method Extension4|get#method1<T extends core::Object* = dynamic>(lowered final self::Extension4|get#method1::T* #this) → <S extends core::Object*>() →* dynamic
-  return <S extends core::Object*>() → dynamic => self::Extension4|method1<self::Extension4|get#method1::T*, S*>(#this);
-static method Extension4|method2<T extends core::Object* = dynamic, S extends core::String*>(lowered final self::Extension4|method2::T* #this) → dynamic {}
-static method Extension4|get#method2<T extends core::Object* = dynamic>(lowered final self::Extension4|get#method2::T* #this) → <S extends core::String*>() →* dynamic
-  return <S extends core::String*>() → dynamic => self::Extension4|method2<self::Extension4|get#method2::T*, S*>(#this);
-static method Extension4|method3<T extends core::Object* = dynamic, S extends dynamic>(lowered final self::Extension4|method3::T* #this) → dynamic {}
-static method Extension4|get#method3<T extends core::Object* = dynamic>(lowered final self::Extension4|get#method3::T* #this) → <S extends dynamic>() →* dynamic
-  return <S extends dynamic>() → dynamic => self::Extension4|method3<self::Extension4|get#method3::T*, S%>(#this);
-static method Extension4|method4<T extends core::Object* = dynamic, S extends core::Object* = dynamic>(lowered final self::Extension4|method4::T* #this) → dynamic {}
-static method Extension4|get#method4<T extends core::Object* = dynamic>(lowered final self::Extension4|get#method4::T* #this) → <S extends core::Object* = dynamic>() →* dynamic
-  return <S extends core::Object* = dynamic>() → dynamic => self::Extension4|method4<self::Extension4|get#method4::T*, S*>(#this);
+static method Extension3|method4<T extends dynamic, S extends core::Object? = dynamic>(lowered final self::Extension3|method4::T% #this) → dynamic {}
+static method Extension3|get#method4<T extends dynamic>(lowered final self::Extension3|get#method4::T% #this) → <S extends core::Object? = dynamic>() → dynamic
+  return <S extends core::Object? = dynamic>() → dynamic => self::Extension3|method4<self::Extension3|get#method4::T%, S%>(#this);
+static method Extension4|method1<T extends core::Object? = dynamic, S extends core::Object>(lowered final self::Extension4|method1::T% #this) → dynamic {}
+static method Extension4|get#method1<T extends core::Object? = dynamic>(lowered final self::Extension4|get#method1::T% #this) → <S extends core::Object>() → dynamic
+  return <S extends core::Object>() → dynamic => self::Extension4|method1<self::Extension4|get#method1::T%, S>(#this);
+static method Extension4|method2<T extends core::Object? = dynamic, S extends core::String>(lowered final self::Extension4|method2::T% #this) → dynamic {}
+static method Extension4|get#method2<T extends core::Object? = dynamic>(lowered final self::Extension4|get#method2::T% #this) → <S extends core::String>() → dynamic
+  return <S extends core::String>() → dynamic => self::Extension4|method2<self::Extension4|get#method2::T%, S>(#this);
+static method Extension4|method3<T extends core::Object? = dynamic, S extends dynamic>(lowered final self::Extension4|method3::T% #this) → dynamic {}
+static method Extension4|get#method3<T extends core::Object? = dynamic>(lowered final self::Extension4|get#method3::T% #this) → <S extends dynamic>() → dynamic
+  return <S extends dynamic>() → dynamic => self::Extension4|method3<self::Extension4|get#method3::T%, S%>(#this);
+static method Extension4|method4<T extends core::Object? = dynamic, S extends core::Object? = dynamic>(lowered final self::Extension4|method4::T% #this) → dynamic {}
+static method Extension4|get#method4<T extends core::Object? = dynamic>(lowered final self::Extension4|get#method4::T% #this) → <S extends core::Object? = dynamic>() → dynamic
+  return <S extends core::Object? = dynamic>() → dynamic => self::Extension4|method4<self::Extension4|get#method4::T%, S%>(#this);
 static method main() → dynamic {}

pkg/front_end/testcases/extensions/bounds.dart.weak.outline.expect

@@ -1,8 +1,8 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
-extension Extension1<T extends core::Object*> on T* {
+extension Extension1<T extends core::Object> on T {
   method method1 = self::Extension1|method1;
   tearoff method1 = self::Extension1|get#method1;
   method method2 = self::Extension1|method2;
@@ -12,7 +12,7 @@ extension Extension1<T extends core::Object*> on T* {
   method method4 = self::Extension1|method4;
   tearoff method4 = self::Extension1|get#method4;
 }
-extension Extension2<T extends core::String*> on T* {
+extension Extension2<T extends core::String> on T {
   method method1 = self::Extension2|method1;
   tearoff method1 = self::Extension2|get#method1;
   method method2 = self::Extension2|method2;
@@ -22,7 +22,7 @@ extension Extension2<T extends core::String*> on T* {
   method method4 = self::Extension2|method4;
   tearoff method4 = self::Extension2|get#method4;
 }
-extension Extension3<T extends dynamic> on T* {
+extension Extension3<T extends dynamic> on T% {
   method method1 = self::Extension3|method1;
   tearoff method1 = self::Extension3|get#method1;
   method method2 = self::Extension3|method2;
@@ -32,7 +32,7 @@ extension Extension3<T extends dynamic> on T* {
   method method4 = self::Extension3|method4;
   tearoff method4 = self::Extension3|get#method4;
 }
-extension Extension4<T extends core::Object* = dynamic> on T* {
+extension Extension4<T extends core::Object? = dynamic> on T% {
   method method1 = self::Extension4|method1;
   tearoff method1 = self::Extension4|get#method1;
   method method2 = self::Extension4|method2;
@@ -42,69 +42,69 @@ extension Extension4<T extends core::Object* = dynamic> on T* {
   method method4 = self::Extension4|method4;
   tearoff method4 = self::Extension4|get#method4;
 }
-static method Extension1|method1<T extends core::Object*, S extends core::Object*>(lowered final self::Extension1|method1::T* #this) → dynamic
+static method Extension1|method1<T extends core::Object, S extends core::Object>(lowered final self::Extension1|method1::T #this) → dynamic
   ;
-static method Extension1|get#method1<T extends core::Object*>(lowered final self::Extension1|get#method1::T* #this) → <S extends core::Object*>() →* dynamic
-  return <S extends core::Object*>() → dynamic => self::Extension1|method1<self::Extension1|get#method1::T*, S*>(#this);
-static method Extension1|method2<T extends core::Object*, S extends core::String*>(lowered final self::Extension1|method2::T* #this) → dynamic
+static method Extension1|get#method1<T extends core::Object>(lowered final self::Extension1|get#method1::T #this) → <S extends core::Object>() → dynamic
+  return <S extends core::Object>() → dynamic => self::Extension1|method1<self::Extension1|get#method1::T, S>(#this);
+static method Extension1|method2<T extends core::Object, S extends core::String>(lowered final self::Extension1|method2::T #this) → dynamic
   ;
-static method Extension1|get#method2<T extends core::Object*>(lowered final self::Extension1|get#method2::T* #this) → <S extends core::String*>() →* dynamic
-  return <S extends core::String*>() → dynamic => self::Extension1|method2<self::Extension1|get#method2::T*, S*>(#this);
-static method Extension1|method3<T extends core::Object*, S extends dynamic>(lowered final self::Extension1|method3::T* #this) → dynamic
+static method Extension1|get#method2<T extends core::Object>(lowered final self::Extension1|get#method2::T #this) → <S extends core::String>() → dynamic
+  return <S extends core::String>() → dynamic => self::Extension1|method2<self::Extension1|get#method2::T, S>(#this);
+static method Extension1|method3<T extends core::Object, S extends dynamic>(lowered final self::Extension1|method3::T #this) → dynamic
   ;
-static method Extension1|get#method3<T extends core::Object*>(lowered final self::Extension1|get#method3::T* #this) → <S extends dynamic>() →* dynamic
-  return <S extends dynamic>() → dynamic => self::Extension1|method3<self::Extension1|get#method3::T*, S%>(#this);
-static method Extension1|method4<T extends core::Object*, S extends core::Object* = dynamic>(lowered final self::Extension1|method4::T* #this) → dynamic
+static method Extension1|get#method3<T extends core::Object>(lowered final self::Extension1|get#method3::T #this) → <S extends dynamic>() → dynamic
+  return <S extends dynamic>() → dynamic => self::Extension1|method3<self::Extension1|get#method3::T, S%>(#this);
+static method Extension1|method4<T extends core::Object, S extends core::Object? = dynamic>(lowered final self::Extension1|method4::T #this) → dynamic
   ;
-static method Extension1|get#method4<T extends core::Object*>(lowered final self::Extension1|get#method4::T* #this) → <S extends core::Object* = dynamic>() →* dynamic
-  return <S extends core::Object* = dynamic>() → dynamic => self::Extension1|method4<self::Extension1|get#method4::T*, S*>(#this);
-static method Extension2|method1<T extends core::String*, S extends core::Object*>(lowered final self::Extension2|method1::T* #this) → dynamic
+static method Extension1|get#method4<T extends core::Object>(lowered final self::Extension1|get#method4::T #this) → <S extends core::Object? = dynamic>() → dynamic
+  return <S extends core::Object? = dynamic>() → dynamic => self::Extension1|method4<self::Extension1|get#method4::T, S%>(#this);
+static method Extension2|method1<T extends core::String, S extends core::Object>(lowered final self::Extension2|method1::T #this) → dynamic
   ;
-static method Extension2|get#method1<T extends core::String*>(lowered final self::Extension2|get#method1::T* #this) → <S extends core::Object*>() →* dynamic
-  return <S extends core::Object*>() → dynamic => self::Extension2|method1<self::Extension2|get#method1::T*, S*>(#this);
-static method Extension2|method2<T extends core::String*, S extends core::String*>(lowered final self::Extension2|method2::T* #this) → dynamic
+static method Extension2|get#method1<T extends core::String>(lowered final self::Extension2|get#method1::T #this) → <S extends core::Object>() → dynamic
+  return <S extends core::Object>() → dynamic => self::Extension2|method1<self::Extension2|get#method1::T, S>(#this);
+static method Extension2|method2<T extends core::String, S extends core::String>(lowered final self::Extension2|method2::T #this) → dynamic
   ;
-static method Extension2|get#method2<T extends core::String*>(lowered final self::Extension2|get#method2::T* #this) → <S extends core::String*>() →* dynamic
-  return <S extends core::String*>() → dynamic => self::Extension2|method2<self::Extension2|get#method2::T*, S*>(#this);
-static method Extension2|method3<T extends core::String*, S extends dynamic>(lowered final self::Extension2|method3::T* #this) → dynamic
+static method Extension2|get#method2<T extends core::String>(lowered final self::Extension2|get#method2::T #this) → <S extends core::String>() → dynamic
+  return <S extends core::String>() → dynamic => self::Extension2|method2<self::Extension2|get#method2::T, S>(#this);
+static method Extension2|method3<T extends core::String, S extends dynamic>(lowered final self::Extension2|method3::T #this) → dynamic
   ;
-static method Extension2|get#method3<T extends core::String*>(lowered final self::Extension2|get#method3::T* #this) → <S extends dynamic>() →* dynamic
-  return <S extends dynamic>() → dynamic => self::Extension2|method3<self::Extension2|get#method3::T*, S%>(#this);
-static method Extension2|method4<T extends core::String*, S extends core::Object* = dynamic>(lowered final self::Extension2|method4::T* #this) → dynamic
+static method Extension2|get#method3<T extends core::String>(lowered final self::Extension2|get#method3::T #this) → <S extends dynamic>() → dynamic
+  return <S extends dynamic>() → dynamic => self::Extension2|method3<self::Extension2|get#method3::T, S%>(#this);
+static method Extension2|method4<T extends core::String, S extends core::Object? = dynamic>(lowered final self::Extension2|method4::T #this) → dynamic
   ;
-static method Extension2|get#method4<T extends core::String*>(lowered final self::Extension2|get#method4::T* #this) → <S extends core::Object* = dynamic>() →* dynamic
-  return <S extends core::Object* = dynamic>() → dynamic => self::Extension2|method4<self::Extension2|get#method4::T*, S*>(#this);
-static method Extension3|method1<T extends dynamic, S extends core::Object*>(lowered final self::Extension3|method1::T* #this) → dynamic
+static method Extension2|get#method4<T extends core::String>(lowered final self::Extension2|get#method4::T #this) → <S extends core::Object? = dynamic>() → dynamic
+  return <S extends core::Object? = dynamic>() → dynamic => self::Extension2|method4<self::Extension2|get#method4::T, S%>(#this);
+static method Extension3|method1<T extends dynamic, S extends core::Object>(lowered final self::Extension3|method1::T% #this) → dynamic
   ;
-static method Extension3|get#method1<T extends dynamic>(lowered final self::Extension3|get#method1::T* #this) → <S extends core::Object*>() →* dynamic
-  return <S extends core::Object*>() → dynamic => self::Extension3|method1<self::Extension3|get#method1::T%, S*>(#this);
-static method Extension3|method2<T extends dynamic, S extends core::String*>(lowered final self::Extension3|method2::T* #this) → dynamic
+static method Extension3|get#method1<T extends dynamic>(lowered final self::Extension3|get#method1::T% #this) → <S extends core::Object>() → dynamic
+  return <S extends core::Object>() → dynamic => self::Extension3|method1<self::Extension3|get#method1::T%, S>(#this);
+static method Extension3|method2<T extends dynamic, S extends core::String>(lowered final self::Extension3|method2::T% #this) → dynamic
   ;
-static method Extension3|get#method2<T extends dynamic>(lowered final self::Extension3|get#method2::T* #this) → <S extends core::String*>() →* dynamic
-  return <S extends core::String*>() → dynamic => self::Extension3|method2<self::Extension3|get#method2::T%, S*>(#this);
-static method Extension3|method3<T extends dynamic, S extends dynamic>(lowered final self::Extension3|method3::T* #this) → dynamic
+static method Extension3|get#method2<T extends dynamic>(lowered final self::Extension3|get#method2::T% #this) → <S extends core::String>() → dynamic
+  return <S extends core::String>() → dynamic => self::Extension3|method2<self::Extension3|get#method2::T%, S>(#this);
+static method Extension3|method3<T extends dynamic, S extends dynamic>(lowered final self::Extension3|method3::T% #this) → dynamic
   ;
-static method Extension3|get#method3<T extends dynamic>(lowered final self::Extension3|get#method3::T* #this) → <S extends dynamic>() →* dynamic
+static method Extension3|get#method3<T extends dynamic>(lowered final self::Extension3|get#method3::T% #this) → <S extends dynamic>() → dynamic
   return <S extends dynamic>() → dynamic => self::Extension3|method3<self::Extension3|get#method3::T%, S%>(#this);
-static method Extension3|method4<T extends dynamic, S extends core::Object* = dynamic>(lowered final self::Extension3|method4::T* #this) → dynamic
+static method Extension3|method4<T extends dynamic, S extends core::Object? = dynamic>(lowered final self::Extension3|method4::T% #this) → dynamic
   ;
-static method Extension3|get#method4<T extends dynamic>(lowered final self::Extension3|get#method4::T* #this) → <S extends core::Object* = dynamic>() →* dynamic
-  return <S extends core::Object* = dynamic>() → dynamic => self::Extension3|method4<self::Extension3|get#method4::T%, S*>(#this);
-static method Extension4|method1<T extends core::Object* = dynamic, S extends core::Object*>(lowered final self::Extension4|method1::T* #this) → dynamic
+static method Extension3|get#method4<T extends dynamic>(lowered final self::Extension3|get#method4::T% #this) → <S extends core::Object? = dynamic>() → dynamic
+  return <S extends core::Object? = dynamic>() → dynamic => self::Extension3|method4<self::Extension3|get#method4::T%, S%>(#this);
+static method Extension4|method1<T extends core::Object? = dynamic, S extends core::Object>(lowered final self::Extension4|method1::T% #this) → dynamic
   ;
-static method Extension4|get#method1<T extends core::Object* = dynamic>(lowered final self::Extension4|get#method1::T* #this) → <S extends core::Object*>() →* dynamic
-  return <S extends core::Object*>() → dynamic => self::Extension4|method1<self::Extension4|get#method1::T*, S*>(#this);
-static method Extension4|method2<T extends core::Object* = dynamic, S extends core::String*>(lowered final self::Extension4|method2::T* #this) → dynamic
+static method Extension4|get#method1<T extends core::Object? = dynamic>(lowered final self::Extension4|get#method1::T% #this) → <S extends core::Object>() → dynamic
+  return <S extends core::Object>() → dynamic => self::Extension4|method1<self::Extension4|get#method1::T%, S>(#this);
+static method Extension4|method2<T extends core::Object? = dynamic, S extends core::String>(lowered final self::Extension4|method2::T% #this) → dynamic
   ;
-static method Extension4|get#method2<T extends core::Object* = dynamic>(lowered final self::Extension4|get#method2::T* #this) → <S extends core::String*>() →* dynamic
-  return <S extends core::String*>() → dynamic => self::Extension4|method2<self::Extension4|get#method2::T*, S*>(#this);
-static method Extension4|method3<T extends core::Object* = dynamic, S extends dynamic>(lowered final self::Extension4|method3::T* #this) → dynamic
+static method Extension4|get#method2<T extends core::Object? = dynamic>(lowered final self::Extension4|get#method2::T% #this) → <S extends core::String>() → dynamic
+  return <S extends core::String>() → dynamic => self::Extension4|method2<self::Extension4|get#method2::T%, S>(#this);
+static method Extension4|method3<T extends core::Object? = dynamic, S extends dynamic>(lowered final self::Extension4|method3::T% #this) → dynamic
   ;
-static method Extension4|get#method3<T extends core::Object* = dynamic>(lowered final self::Extension4|get#method3::T* #this) → <S extends dynamic>() →* dynamic
-  return <S extends dynamic>() → dynamic => self::Extension4|method3<self::Extension4|get#method3::T*, S%>(#this);
-static method Extension4|method4<T extends core::Object* = dynamic, S extends core::Object* = dynamic>(lowered final self::Extension4|method4::T* #this) → dynamic
+static method Extension4|get#method3<T extends core::Object? = dynamic>(lowered final self::Extension4|get#method3::T% #this) → <S extends dynamic>() → dynamic
+  return <S extends dynamic>() → dynamic => self::Extension4|method3<self::Extension4|get#method3::T%, S%>(#this);
+static method Extension4|method4<T extends core::Object? = dynamic, S extends core::Object? = dynamic>(lowered final self::Extension4|method4::T% #this) → dynamic
   ;
-static method Extension4|get#method4<T extends core::Object* = dynamic>(lowered final self::Extension4|get#method4::T* #this) → <S extends core::Object* = dynamic>() →* dynamic
-  return <S extends core::Object* = dynamic>() → dynamic => self::Extension4|method4<self::Extension4|get#method4::T*, S*>(#this);
+static method Extension4|get#method4<T extends core::Object? = dynamic>(lowered final self::Extension4|get#method4::T% #this) → <S extends core::Object? = dynamic>() → dynamic
+  return <S extends core::Object? = dynamic>() → dynamic => self::Extension4|method4<self::Extension4|get#method4::T%, S%>(#this);
 static method main() → dynamic
   ;

pkg/front_end/testcases/extensions/bounds.dart.weak.transformed.expect

@@ -1,8 +1,8 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
-extension Extension1<T extends core::Object*> on T* {
+extension Extension1<T extends core::Object> on T {
   method method1 = self::Extension1|method1;
   tearoff method1 = self::Extension1|get#method1;
   method method2 = self::Extension1|method2;
@@ -12,7 +12,7 @@ extension Extension1<T extends core::Object*> on T* {
   method method4 = self::Extension1|method4;
   tearoff method4 = self::Extension1|get#method4;
 }
-extension Extension2<T extends core::String*> on T* {
+extension Extension2<T extends core::String> on T {
   method method1 = self::Extension2|method1;
   tearoff method1 = self::Extension2|get#method1;
   method method2 = self::Extension2|method2;
@@ -22,7 +22,7 @@ extension Extension2<T extends core::String*> on T* {
   method method4 = self::Extension2|method4;
   tearoff method4 = self::Extension2|get#method4;
 }
-extension Extension3<T extends dynamic> on T* {
+extension Extension3<T extends dynamic> on T% {
   method method1 = self::Extension3|method1;
   tearoff method1 = self::Extension3|get#method1;
   method method2 = self::Extension3|method2;
@@ -32,7 +32,7 @@ extension Extension3<T extends dynamic> on T* {
   method method4 = self::Extension3|method4;
   tearoff method4 = self::Extension3|get#method4;
 }
-extension Extension4<T extends core::Object* = dynamic> on T* {
+extension Extension4<T extends core::Object? = dynamic> on T% {
   method method1 = self::Extension4|method1;
   tearoff method1 = self::Extension4|get#method1;
   method method2 = self::Extension4|method2;
@@ -42,52 +42,52 @@ extension Extension4<T extends core::Object* = dynamic> on T* {
   method method4 = self::Extension4|method4;
   tearoff method4 = self::Extension4|get#method4;
 }
-static method Extension1|method1<T extends core::Object*, S extends core::Object*>(lowered final self::Extension1|method1::T* #this) → dynamic {}
-static method Extension1|get#method1<T extends core::Object*>(lowered final self::Extension1|get#method1::T* #this) → <S extends core::Object*>() →* dynamic
-  return <S extends core::Object*>() → dynamic => self::Extension1|method1<self::Extension1|get#method1::T*, S*>(#this);
-static method Extension1|method2<T extends core::Object*, S extends core::String*>(lowered final self::Extension1|method2::T* #this) → dynamic {}
-static method Extension1|get#method2<T extends core::Object*>(lowered final self::Extension1|get#method2::T* #this) → <S extends core::String*>() →* dynamic
-  return <S extends core::String*>() → dynamic => self::Extension1|method2<self::Extension1|get#method2::T*, S*>(#this);
-static method Extension1|method3<T extends core::Object*, S extends dynamic>(lowered final self::Extension1|method3::T* #this) → dynamic {}
-static method Extension1|get#method3<T extends core::Object*>(lowered final self::Extension1|get#method3::T* #this) → <S extends dynamic>() →* dynamic
-  return <S extends dynamic>() → dynamic => self::Extension1|method3<self::Extension1|get#method3::T*, S%>(#this);
-static method Extension1|method4<T extends core::Object*, S extends core::Object* = dynamic>(lowered final self::Extension1|method4::T* #this) → dynamic {}
-static method Extension1|get#method4<T extends core::Object*>(lowered final self::Extension1|get#method4::T* #this) → <S extends core::Object* = dynamic>() →* dynamic
-  return <S extends core::Object* = dynamic>() → dynamic => self::Extension1|method4<self::Extension1|get#method4::T*, S*>(#this);
-static method Extension2|method1<T extends core::String*, S extends core::Object*>(lowered final self::Extension2|method1::T* #this) → dynamic {}
-static method Extension2|get#method1<T extends core::String*>(lowered final self::Extension2|get#method1::T* #this) → <S extends core::Object*>() →* dynamic
-  return <S extends core::Object*>() → dynamic => self::Extension2|method1<self::Extension2|get#method1::T*, S*>(#this);
-static method Extension2|method2<T extends core::String*, S extends core::String*>(lowered final self::Extension2|method2::T* #this) → dynamic {}
-static method Extension2|get#method2<T extends core::String*>(lowered final self::Extension2|get#method2::T* #this) → <S extends core::String*>() →* dynamic
-  return <S extends core::String*>() → dynamic => self::Extension2|method2<self::Extension2|get#method2::T*, S*>(#this);
-static method Extension2|method3<T extends core::String*, S extends dynamic>(lowered final self::Extension2|method3::T* #this) → dynamic {}
-static method Extension2|get#method3<T extends core::String*>(lowered final self::Extension2|get#method3::T* #this) → <S extends dynamic>() →* dynamic
-  return <S extends dynamic>() → dynamic => self::Extension2|method3<self::Extension2|get#method3::T*, S%>(#this);
-static method Extension2|method4<T extends core::String*, S extends core::Object* = dynamic>(lowered final self::Extension2|method4::T* #this) → dynamic {}
-static method Extension2|get#method4<T extends core::String*>(lowered final self::Extension2|get#method4::T* #this) → <S extends core::Object* = dynamic>() →* dynamic
-  return <S extends core::Object* = dynamic>() → dynamic => self::Extension2|method4<self::Extension2|get#method4::T*, S*>(#this);
-static method Extension3|method1<T extends dynamic, S extends core::Object*>(lowered final self::Extension3|method1::T* #this) → dynamic {}
-static method Extension3|get#method1<T extends dynamic>(lowered final self::Extension3|get#method1::T* #this) → <S extends core::Object*>() →* dynamic
-  return <S extends core::Object*>() → dynamic => self::Extension3|method1<self::Extension3|get#method1::T%, S*>(#this);
-static method Extension3|method2<T extends dynamic, S extends core::String*>(lowered final self::Extension3|method2::T* #this) → dynamic {}
-static method Extension3|get#method2<T extends dynamic>(lowered final self::Extension3|get#method2::T* #this) → <S extends core::String*>() →* dynamic
-  return <S extends core::String*>() → dynamic => self::Extension3|method2<self::Extension3|get#method2::T%, S*>(#this);
-static method Extension3|method3<T extends dynamic, S extends dynamic>(lowered final self::Extension3|method3::T* #this) → dynamic {}
-static method Extension3|get#method3<T extends dynamic>(lowered final self::Extension3|get#method3::T* #this) → <S extends dynamic>() →* dynamic
+static method Extension1|method1<T extends core::Object, S extends core::Object>(lowered final self::Extension1|method1::T #this) → dynamic {}
+static method Extension1|get#method1<T extends core::Object>(lowered final self::Extension1|get#method1::T #this) → <S extends core::Object>() → dynamic
+  return <S extends core::Object>() → dynamic => self::Extension1|method1<self::Extension1|get#method1::T, S>(#this);
+static method Extension1|method2<T extends core::Object, S extends core::String>(lowered final self::Extension1|method2::T #this) → dynamic {}
+static method Extension1|get#method2<T extends core::Object>(lowered final self::Extension1|get#method2::T #this) → <S extends core::String>() → dynamic
+  return <S extends core::String>() → dynamic => self::Extension1|method2<self::Extension1|get#method2::T, S>(#this);
+static method Extension1|method3<T extends core::Object, S extends dynamic>(lowered final self::Extension1|method3::T #this) → dynamic {}
+static method Extension1|get#method3<T extends core::Object>(lowered final self::Extension1|get#method3::T #this) → <S extends dynamic>() → dynamic
+  return <S extends dynamic>() → dynamic => self::Extension1|method3<self::Extension1|get#method3::T, S%>(#this);
+static method Extension1|method4<T extends core::Object, S extends core::Object? = dynamic>(lowered final self::Extension1|method4::T #this) → dynamic {}
+static method Extension1|get#method4<T extends core::Object>(lowered final self::Extension1|get#method4::T #this) → <S extends core::Object? = dynamic>() → dynamic
+  return <S extends core::Object? = dynamic>() → dynamic => self::Extension1|method4<self::Extension1|get#method4::T, S%>(#this);
+static method Extension2|method1<T extends core::String, S extends core::Object>(lowered final self::Extension2|method1::T #this) → dynamic {}
+static method Extension2|get#method1<T extends core::String>(lowered final self::Extension2|get#method1::T #this) → <S extends core::Object>() → dynamic
+  return <S extends core::Object>() → dynamic => self::Extension2|method1<self::Extension2|get#method1::T, S>(#this);
+static method Extension2|method2<T extends core::String, S extends core::String>(lowered final self::Extension2|method2::T #this) → dynamic {}
+static method Extension2|get#method2<T extends core::String>(lowered final self::Extension2|get#method2::T #this) → <S extends core::String>() → dynamic
+  return <S extends core::String>() → dynamic => self::Extension2|method2<self::Extension2|get#method2::T, S>(#this);
+static method Extension2|method3<T extends core::String, S extends dynamic>(lowered final self::Extension2|method3::T #this) → dynamic {}
+static method Extension2|get#method3<T extends core::String>(lowered final self::Extension2|get#method3::T #this) → <S extends dynamic>() → dynamic
+  return <S extends dynamic>() → dynamic => self::Extension2|method3<self::Extension2|get#method3::T, S%>(#this);
+static method Extension2|method4<T extends core::String, S extends core::Object? = dynamic>(lowered final self::Extension2|method4::T #this) → dynamic {}
+static method Extension2|get#method4<T extends core::String>(lowered final self::Extension2|get#method4::T #this) → <S extends core::Object? = dynamic>() → dynamic
+  return <S extends core::Object? = dynamic>() → dynamic => self::Extension2|method4<self::Extension2|get#method4::T, S%>(#this);
+static method Extension3|method1<T extends dynamic, S extends core::Object>(lowered final self::Extension3|method1::T% #this) → dynamic {}
+static method Extension3|get#method1<T extends dynamic>(lowered final self::Extension3|get#method1::T% #this) → <S extends core::Object>() → dynamic
+  return <S extends core::Object>() → dynamic => self::Extension3|method1<self::Extension3|get#method1::T%, S>(#this);
+static method Extension3|method2<T extends dynamic, S extends core::String>(lowered final self::Extension3|method2::T% #this) → dynamic {}
+static method Extension3|get#method2<T extends dynamic>(lowered final self::Extension3|get#method2::T% #this) → <S extends core::String>() → dynamic
+  return <S extends core::String>() → dynamic => self::Extension3|method2<self::Extension3|get#method2::T%, S>(#this);
+static method Extension3|method3<T extends dynamic, S extends dynamic>(lowered final self::Extension3|method3::T% #this) → dynamic {}
+static method Extension3|get#method3<T extends dynamic>(lowered final self::Extension3|get#method3::T% #this) → <S extends dynamic>() → dynamic
   return <S extends dynamic>() → dynamic => self::Extension3|method3<self::Extension3|get#method3::T%, S%>(#this);
-static method Extension3|method4<T extends dynamic, S extends core::Object* = dynamic>(lowered final self::Extension3|method4::T* #this) → dynamic {}
-static method Extension3|get#method4<T extends dynamic>(lowered final self::Extension3|get#method4::T* #this) → <S extends core::Object* = dynamic>() →* dynamic
-  return <S extends core::Object* = dynamic>() → dynamic => self::Extension3|method4<self::Extension3|get#method4::T%, S*>(#this);
-static method Extension4|method1<T extends core::Object* = dynamic, S extends core::Object*>(lowered final self::Extension4|method1::T* #this) → dynamic {}
-static method Extension4|get#method1<T extends core::Object* = dynamic>(lowered final self::Extension4|get#method1::T* #this) → <S extends core::Object*>() →* dynamic
-  return <S extends core::Object*>() → dynamic => self::Extension4|method1<self::Extension4|get#method1::T*, S*>(#this);
-static method Extension4|method2<T extends core::Object* = dynamic, S extends core::String*>(lowered final self::Extension4|method2::T* #this) → dynamic {}
-static method Extension4|get#method2<T extends core::Object* = dynamic>(lowered final self::Extension4|get#method2::T* #this) → <S extends core::String*>() →* dynamic
-  return <S extends core::String*>() → dynamic => self::Extension4|method2<self::Extension4|get#method2::T*, S*>(#this);
-static method Extension4|method3<T extends core::Object* = dynamic, S extends dynamic>(lowered final self::Extension4|method3::T* #this) → dynamic {}
-static method Extension4|get#method3<T extends core::Object* = dynamic>(lowered final self::Extension4|get#method3::T* #this) → <S extends dynamic>() →* dynamic
-  return <S extends dynamic>() → dynamic => self::Extension4|method3<self::Extension4|get#method3::T*, S%>(#this);
-static method Extension4|method4<T extends core::Object* = dynamic, S extends core::Object* = dynamic>(lowered final self::Extension4|method4::T* #this) → dynamic {}
-static method Extension4|get#method4<T extends core::Object* = dynamic>(lowered final self::Extension4|get#method4::T* #this) → <S extends core::Object* = dynamic>() →* dynamic
-  return <S extends core::Object* = dynamic>() → dynamic => self::Extension4|method4<self::Extension4|get#method4::T*, S*>(#this);
+static method Extension3|method4<T extends dynamic, S extends core::Object? = dynamic>(lowered final self::Extension3|method4::T% #this) → dynamic {}
+static method Extension3|get#method4<T extends dynamic>(lowered final self::Extension3|get#method4::T% #this) → <S extends core::Object? = dynamic>() → dynamic
+  return <S extends core::Object? = dynamic>() → dynamic => self::Extension3|method4<self::Extension3|get#method4::T%, S%>(#this);
+static method Extension4|method1<T extends core::Object? = dynamic, S extends core::Object>(lowered final self::Extension4|method1::T% #this) → dynamic {}
+static method Extension4|get#method1<T extends core::Object? = dynamic>(lowered final self::Extension4|get#method1::T% #this) → <S extends core::Object>() → dynamic
+  return <S extends core::Object>() → dynamic => self::Extension4|method1<self::Extension4|get#method1::T%, S>(#this);
+static method Extension4|method2<T extends core::Object? = dynamic, S extends core::String>(lowered final self::Extension4|method2::T% #this) → dynamic {}
+static method Extension4|get#method2<T extends core::Object? = dynamic>(lowered final self::Extension4|get#method2::T% #this) → <S extends core::String>() → dynamic
+  return <S extends core::String>() → dynamic => self::Extension4|method2<self::Extension4|get#method2::T%, S>(#this);
+static method Extension4|method3<T extends core::Object? = dynamic, S extends dynamic>(lowered final self::Extension4|method3::T% #this) → dynamic {}
+static method Extension4|get#method3<T extends core::Object? = dynamic>(lowered final self::Extension4|get#method3::T% #this) → <S extends dynamic>() → dynamic
+  return <S extends dynamic>() → dynamic => self::Extension4|method3<self::Extension4|get#method3::T%, S%>(#this);
+static method Extension4|method4<T extends core::Object? = dynamic, S extends core::Object? = dynamic>(lowered final self::Extension4|method4::T% #this) → dynamic {}
+static method Extension4|get#method4<T extends core::Object? = dynamic>(lowered final self::Extension4|get#method4::T% #this) → <S extends core::Object? = dynamic>() → dynamic
+  return <S extends core::Object? = dynamic>() → dynamic => self::Extension4|method4<self::Extension4|get#method4::T%, S%>(#this);
 static method main() → dynamic {}

pkg/front_end/testcases/extensions/builtin_identifiers.dart

@@ -1,7 +1,7 @@
 // Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// @dart=2.9
+
 extension mixin on int {}
 
 extension extension on int {}

pkg/front_end/testcases/extensions/builtin_identifiers.dart.textual_outline.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 extension mixin on int {}
 
 extension extension on int {}

pkg/front_end/testcases/extensions/builtin_identifiers.dart.textual_outline_modelled.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 extension as on int {}
 
 extension extension on int {}

pkg/front_end/testcases/extensions/builtin_identifiers.dart.weak.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -17,10 +17,10 @@ library;
 import self as self;
 import "dart:core" as core;
 
-extension mixin on core::int* {
+extension mixin on core::int {
 }
-extension extension on core::int* {
+extension extension on core::int {
 }
-extension as on core::int* {
+extension as on core::int {
 }
 static method main() → void {}

pkg/front_end/testcases/extensions/builtin_identifiers.dart.weak.modular.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -17,10 +17,10 @@ library;
 import self as self;
 import "dart:core" as core;
 
-extension mixin on core::int* {
+extension mixin on core::int {
 }
-extension extension on core::int* {
+extension extension on core::int {
 }
-extension as on core::int* {
+extension as on core::int {
 }
 static method main() → void {}

pkg/front_end/testcases/extensions/builtin_identifiers.dart.weak.outline.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -17,11 +17,11 @@ library;
 import self as self;
 import "dart:core" as core;
 
-extension mixin on core::int* {
+extension mixin on core::int {
 }
-extension extension on core::int* {
+extension extension on core::int {
 }
-extension as on core::int* {
+extension as on core::int {
 }
 static method main() → void
   ;

pkg/front_end/testcases/extensions/builtin_identifiers.dart.weak.transformed.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -17,10 +17,10 @@ library;
 import self as self;
 import "dart:core" as core;
 
-extension mixin on core::int* {
+extension mixin on core::int {
 }
-extension extension on core::int* {
+extension extension on core::int {
 }
-extension as on core::int* {
+extension as on core::int {
 }
 static method main() → void {}

pkg/front_end/testcases/extensions/call_methods.dart

@@ -1,7 +1,7 @@
 // Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// @dart=2.9
+
 class A {
   String get call => "My name is A";
 }

pkg/front_end/testcases/extensions/call_methods.dart.textual_outline.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 class A {
   String get call => "My name is A";
 }

pkg/front_end/testcases/extensions/call_methods.dart.textual_outline_modelled.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 A a = new A();
 B b = new B();
 

pkg/front_end/testcases/extensions/call_methods.dart.weak.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -76,84 +76,64 @@ import self as self;
 import "dart:core" as core;
 
 class A extends core::Object {
-  synthetic constructor •() → self::A*
+  synthetic constructor •() → self::A
     : super core::Object::•()
     ;
-  get call() → core::String*
+  get call() → core::String
     return "My name is A";
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
 class B extends core::Object {
-  synthetic constructor •() → self::B*
+  synthetic constructor •() → self::B
     : super core::Object::•()
     ;
-  get call() → () →* core::String*
-    return () → core::String* => "My name is B";
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
+  get call() → () → core::String
+    return () → core::String => "My name is B";
 }
-extension _extension#0 on core::int* {
+extension _extension#0 on core::int {
   get call = self::_extension#0|get#call;
 }
-extension _extension#1 on core::num* {
+extension _extension#1 on core::num {
   get call = self::_extension#1|get#call;
 }
-extension _extension#2 on core::String* {
+extension _extension#2 on core::String {
   get call = self::_extension#2|get#call;
 }
-static field core::String* topLevel1 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:29:18: Error: Too many positional arguments: 0 allowed, but 1 found.
+static field core::String topLevel1 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:29:18: Error: Too many positional arguments: 0 allowed, but 1 found.
 Try removing the extra positional arguments.
 var topLevel1 = 1(10);
                  ^" in self::_extension#2|get#call(self::_extension#0|get#call(1)){<inapplicable>}.(10);
-static field core::String* topLevel2 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:30:18: Error: Too many positional arguments: 0 allowed, but 1 found.
+static field core::String topLevel2 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:30:18: Error: Too many positional arguments: 0 allowed, but 1 found.
 Try removing the extra positional arguments.
 var topLevel2 = 1(\"10\");
                  ^" in self::_extension#2|get#call(self::_extension#0|get#call(1)){<inapplicable>}.("10");
-static field core::String* topLevel3 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:31:20: Error: Too many positional arguments: 0 allowed, but 1 found.
+static field core::String topLevel3 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:31:20: Error: Too many positional arguments: 0 allowed, but 1 found.
 Try removing the extra positional arguments.
 var topLevel3 = 1.0(10);
                    ^" in self::_extension#2|get#call(self::_extension#1|get#call(1.0)){<inapplicable>}.(10);
-static field core::String* topLevel4 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:32:20: Error: Too many positional arguments: 0 allowed, but 1 found.
+static field core::String topLevel4 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:32:20: Error: Too many positional arguments: 0 allowed, but 1 found.
 Try removing the extra positional arguments.
 var topLevel4 = 1.0(\"10\");
                    ^" in self::_extension#2|get#call(self::_extension#1|get#call(1.0)){<inapplicable>}.("10");
-static field self::A* a = new self::A::•();
+static field self::A a = new self::A::•();
 static field invalid-type topLevel5 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:34:18: Error: Cannot invoke an instance of 'A' because it declares 'call' to be something other than a method.
  - 'A' is from 'pkg/front_end/testcases/extensions/call_methods.dart'.
 Try changing 'call' to a method or explicitly invoke 'call'.
 var topLevel5 = a(2);
                  ^";
-static field self::B* b = new self::B::•();
+static field self::B b = new self::B::•();
 static field invalid-type topLevel6 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:36:18: Error: Cannot invoke an instance of 'A' because it declares 'call' to be something other than a method.
  - 'A' is from 'pkg/front_end/testcases/extensions/call_methods.dart'.
 Try changing 'call' to a method or explicitly invoke 'call'.
 var topLevel6 = a(2, \"3\");
                  ^";
-static method _extension#0|get#call(lowered final core::int* #this) → core::String*
+static method _extension#0|get#call(lowered final core::int #this) → core::String
   return "My name is int";
-static method _extension#1|get#call(lowered final core::num* #this) → core::String*
+static method _extension#1|get#call(lowered final core::num #this) → core::String
   return "My name is num";
-static method _extension#2|get#call(lowered final core::String* #this) → () →* core::String*
-  return () → core::String* => "My name is String";
+static method _extension#2|get#call(lowered final core::String #this) → () → core::String
+  return () → core::String => "My name is String";
 static method main() → dynamic {
-  self::_extension#2|get#call("")(){() →* core::String*};
+  self::_extension#2|get#call("")(){() → core::String};
 }
 static method errors() → dynamic {
   invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:39:4: Error: Too many positional arguments: 0 allowed, but 1 found.
@@ -172,7 +152,7 @@ Try removing the extra positional arguments.
 Try removing the extra positional arguments.
   1.0(\"10\");
      ^" in self::_extension#2|get#call(self::_extension#1|get#call(1.0)){<inapplicable>}.("10");
-  self::A* a = new self::A::•();
+  self::A a = new self::A::•();
   invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:44:4: Error: Cannot invoke an instance of 'A' because it declares 'call' to be something other than a method.
  - 'A' is from 'pkg/front_end/testcases/extensions/call_methods.dart'.
 Try changing 'call' to a method or explicitly invoke 'call'.
@@ -183,7 +163,7 @@ Try changing 'call' to a method or explicitly invoke 'call'.
 Try changing 'call' to a method or explicitly invoke 'call'.
   a(2, \"3\");
    ^";
-  self::B* b = new self::B::•();
+  self::B b = new self::B::•();
   invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:47:4: Error: Cannot invoke an instance of 'B' because it declares 'call' to be something other than a method.
  - 'B' is from 'pkg/front_end/testcases/extensions/call_methods.dart'.
 Try changing 'call' to a method or explicitly invoke 'call'.

pkg/front_end/testcases/extensions/call_methods.dart.weak.modular.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -76,84 +76,64 @@ import self as self;
 import "dart:core" as core;
 
 class A extends core::Object {
-  synthetic constructor •() → self::A*
+  synthetic constructor •() → self::A
     : super core::Object::•()
     ;
-  get call() → core::String*
+  get call() → core::String
     return "My name is A";
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
 class B extends core::Object {
-  synthetic constructor •() → self::B*
+  synthetic constructor •() → self::B
     : super core::Object::•()
     ;
-  get call() → () →* core::String*
-    return () → core::String* => "My name is B";
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
+  get call() → () → core::String
+    return () → core::String => "My name is B";
 }
-extension _extension#0 on core::int* {
+extension _extension#0 on core::int {
   get call = self::_extension#0|get#call;
 }
-extension _extension#1 on core::num* {
+extension _extension#1 on core::num {
   get call = self::_extension#1|get#call;
 }
-extension _extension#2 on core::String* {
+extension _extension#2 on core::String {
   get call = self::_extension#2|get#call;
 }
-static field core::String* topLevel1 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:29:18: Error: Too many positional arguments: 0 allowed, but 1 found.
+static field core::String topLevel1 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:29:18: Error: Too many positional arguments: 0 allowed, but 1 found.
 Try removing the extra positional arguments.
 var topLevel1 = 1(10);
                  ^" in self::_extension#2|get#call(self::_extension#0|get#call(1)){<inapplicable>}.(10);
-static field core::String* topLevel2 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:30:18: Error: Too many positional arguments: 0 allowed, but 1 found.
+static field core::String topLevel2 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:30:18: Error: Too many positional arguments: 0 allowed, but 1 found.
 Try removing the extra positional arguments.
 var topLevel2 = 1(\"10\");
                  ^" in self::_extension#2|get#call(self::_extension#0|get#call(1)){<inapplicable>}.("10");
-static field core::String* topLevel3 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:31:20: Error: Too many positional arguments: 0 allowed, but 1 found.
+static field core::String topLevel3 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:31:20: Error: Too many positional arguments: 0 allowed, but 1 found.
 Try removing the extra positional arguments.
 var topLevel3 = 1.0(10);
                    ^" in self::_extension#2|get#call(self::_extension#1|get#call(1.0)){<inapplicable>}.(10);
-static field core::String* topLevel4 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:32:20: Error: Too many positional arguments: 0 allowed, but 1 found.
+static field core::String topLevel4 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:32:20: Error: Too many positional arguments: 0 allowed, but 1 found.
 Try removing the extra positional arguments.
 var topLevel4 = 1.0(\"10\");
                    ^" in self::_extension#2|get#call(self::_extension#1|get#call(1.0)){<inapplicable>}.("10");
-static field self::A* a = new self::A::•();
+static field self::A a = new self::A::•();
 static field invalid-type topLevel5 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:34:18: Error: Cannot invoke an instance of 'A' because it declares 'call' to be something other than a method.
  - 'A' is from 'pkg/front_end/testcases/extensions/call_methods.dart'.
 Try changing 'call' to a method or explicitly invoke 'call'.
 var topLevel5 = a(2);
                  ^";
-static field self::B* b = new self::B::•();
+static field self::B b = new self::B::•();
 static field invalid-type topLevel6 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:36:18: Error: Cannot invoke an instance of 'A' because it declares 'call' to be something other than a method.
  - 'A' is from 'pkg/front_end/testcases/extensions/call_methods.dart'.
 Try changing 'call' to a method or explicitly invoke 'call'.
 var topLevel6 = a(2, \"3\");
                  ^";
-static method _extension#0|get#call(lowered final core::int* #this) → core::String*
+static method _extension#0|get#call(lowered final core::int #this) → core::String
   return "My name is int";
-static method _extension#1|get#call(lowered final core::num* #this) → core::String*
+static method _extension#1|get#call(lowered final core::num #this) → core::String
   return "My name is num";
-static method _extension#2|get#call(lowered final core::String* #this) → () →* core::String*
-  return () → core::String* => "My name is String";
+static method _extension#2|get#call(lowered final core::String #this) → () → core::String
+  return () → core::String => "My name is String";
 static method main() → dynamic {
-  self::_extension#2|get#call("")(){() →* core::String*};
+  self::_extension#2|get#call("")(){() → core::String};
 }
 static method errors() → dynamic {
   invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:39:4: Error: Too many positional arguments: 0 allowed, but 1 found.
@@ -172,7 +152,7 @@ Try removing the extra positional arguments.
 Try removing the extra positional arguments.
   1.0(\"10\");
      ^" in self::_extension#2|get#call(self::_extension#1|get#call(1.0)){<inapplicable>}.("10");
-  self::A* a = new self::A::•();
+  self::A a = new self::A::•();
   invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:44:4: Error: Cannot invoke an instance of 'A' because it declares 'call' to be something other than a method.
  - 'A' is from 'pkg/front_end/testcases/extensions/call_methods.dart'.
 Try changing 'call' to a method or explicitly invoke 'call'.
@@ -183,7 +163,7 @@ Try changing 'call' to a method or explicitly invoke 'call'.
 Try changing 'call' to a method or explicitly invoke 'call'.
   a(2, \"3\");
    ^";
-  self::B* b = new self::B::•();
+  self::B b = new self::B::•();
   invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:47:4: Error: Cannot invoke an instance of 'B' because it declares 'call' to be something other than a method.
  - 'B' is from 'pkg/front_end/testcases/extensions/call_methods.dart'.
 Try changing 'call' to a method or explicitly invoke 'call'.

pkg/front_end/testcases/extensions/call_methods.dart.weak.outline.expect

@@ -1,61 +1,41 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 class A extends core::Object {
-  synthetic constructor •() → self::A*
+  synthetic constructor •() → self::A
     ;
-  get call() → core::String*
+  get call() → core::String
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
 class B extends core::Object {
-  synthetic constructor •() → self::B*
+  synthetic constructor •() → self::B
     ;
-  get call() → () →* core::String*
+  get call() → () → core::String
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension _extension#0 on core::int* {
+extension _extension#0 on core::int {
   get call = self::_extension#0|get#call;
 }
-extension _extension#1 on core::num* {
+extension _extension#1 on core::num {
   get call = self::_extension#1|get#call;
 }
-extension _extension#2 on core::String* {
+extension _extension#2 on core::String {
   get call = self::_extension#2|get#call;
 }
-static field core::String* topLevel1;
-static field core::String* topLevel2;
-static field core::String* topLevel3;
-static field core::String* topLevel4;
-static field self::A* a;
+static field core::String topLevel1;
+static field core::String topLevel2;
+static field core::String topLevel3;
+static field core::String topLevel4;
+static field self::A a;
 static field invalid-type topLevel5;
-static field self::B* b;
+static field self::B b;
 static field invalid-type topLevel6;
-static method _extension#0|get#call(lowered final core::int* #this) → core::String*
+static method _extension#0|get#call(lowered final core::int #this) → core::String
   ;
-static method _extension#1|get#call(lowered final core::num* #this) → core::String*
+static method _extension#1|get#call(lowered final core::num #this) → core::String
   ;
-static method _extension#2|get#call(lowered final core::String* #this) → () →* core::String*
+static method _extension#2|get#call(lowered final core::String #this) → () → core::String
   ;
 static method main() → dynamic
   ;

pkg/front_end/testcases/extensions/call_methods.dart.weak.transformed.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -76,84 +76,64 @@ import self as self;
 import "dart:core" as core;
 
 class A extends core::Object {
-  synthetic constructor •() → self::A*
+  synthetic constructor •() → self::A
     : super core::Object::•()
     ;
-  get call() → core::String*
+  get call() → core::String
     return "My name is A";
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
 class B extends core::Object {
-  synthetic constructor •() → self::B*
+  synthetic constructor •() → self::B
     : super core::Object::•()
     ;
-  get call() → () →* core::String*
-    return () → core::String* => "My name is B";
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
+  get call() → () → core::String
+    return () → core::String => "My name is B";
 }
-extension _extension#0 on core::int* {
+extension _extension#0 on core::int {
   get call = self::_extension#0|get#call;
 }
-extension _extension#1 on core::num* {
+extension _extension#1 on core::num {
   get call = self::_extension#1|get#call;
 }
-extension _extension#2 on core::String* {
+extension _extension#2 on core::String {
   get call = self::_extension#2|get#call;
 }
-static field core::String* topLevel1 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:29:18: Error: Too many positional arguments: 0 allowed, but 1 found.
+static field core::String topLevel1 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:29:18: Error: Too many positional arguments: 0 allowed, but 1 found.
 Try removing the extra positional arguments.
 var topLevel1 = 1(10);
                  ^" in self::_extension#2|get#call(self::_extension#0|get#call(1)){<inapplicable>}.(10);
-static field core::String* topLevel2 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:30:18: Error: Too many positional arguments: 0 allowed, but 1 found.
+static field core::String topLevel2 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:30:18: Error: Too many positional arguments: 0 allowed, but 1 found.
 Try removing the extra positional arguments.
 var topLevel2 = 1(\"10\");
                  ^" in self::_extension#2|get#call(self::_extension#0|get#call(1)){<inapplicable>}.("10");
-static field core::String* topLevel3 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:31:20: Error: Too many positional arguments: 0 allowed, but 1 found.
+static field core::String topLevel3 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:31:20: Error: Too many positional arguments: 0 allowed, but 1 found.
 Try removing the extra positional arguments.
 var topLevel3 = 1.0(10);
                    ^" in self::_extension#2|get#call(self::_extension#1|get#call(1.0)){<inapplicable>}.(10);
-static field core::String* topLevel4 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:32:20: Error: Too many positional arguments: 0 allowed, but 1 found.
+static field core::String topLevel4 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:32:20: Error: Too many positional arguments: 0 allowed, but 1 found.
 Try removing the extra positional arguments.
 var topLevel4 = 1.0(\"10\");
                    ^" in self::_extension#2|get#call(self::_extension#1|get#call(1.0)){<inapplicable>}.("10");
-static field self::A* a = new self::A::•();
+static field self::A a = new self::A::•();
 static field invalid-type topLevel5 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:34:18: Error: Cannot invoke an instance of 'A' because it declares 'call' to be something other than a method.
  - 'A' is from 'pkg/front_end/testcases/extensions/call_methods.dart'.
 Try changing 'call' to a method or explicitly invoke 'call'.
 var topLevel5 = a(2);
                  ^";
-static field self::B* b = new self::B::•();
+static field self::B b = new self::B::•();
 static field invalid-type topLevel6 = invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:36:18: Error: Cannot invoke an instance of 'A' because it declares 'call' to be something other than a method.
  - 'A' is from 'pkg/front_end/testcases/extensions/call_methods.dart'.
 Try changing 'call' to a method or explicitly invoke 'call'.
 var topLevel6 = a(2, \"3\");
                  ^";
-static method _extension#0|get#call(lowered final core::int* #this) → core::String*
+static method _extension#0|get#call(lowered final core::int #this) → core::String
   return "My name is int";
-static method _extension#1|get#call(lowered final core::num* #this) → core::String*
+static method _extension#1|get#call(lowered final core::num #this) → core::String
   return "My name is num";
-static method _extension#2|get#call(lowered final core::String* #this) → () →* core::String*
-  return () → core::String* => "My name is String";
+static method _extension#2|get#call(lowered final core::String #this) → () → core::String
+  return () → core::String => "My name is String";
 static method main() → dynamic {
-  self::_extension#2|get#call("")(){() →* core::String*};
+  self::_extension#2|get#call("")(){() → core::String};
 }
 static method errors() → dynamic {
   invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:39:4: Error: Too many positional arguments: 0 allowed, but 1 found.
@@ -172,7 +152,7 @@ Try removing the extra positional arguments.
 Try removing the extra positional arguments.
   1.0(\"10\");
      ^" in self::_extension#2|get#call(self::_extension#1|get#call(1.0)){<inapplicable>}.("10");
-  self::A* a = new self::A::•();
+  self::A a = new self::A::•();
   invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:44:4: Error: Cannot invoke an instance of 'A' because it declares 'call' to be something other than a method.
  - 'A' is from 'pkg/front_end/testcases/extensions/call_methods.dart'.
 Try changing 'call' to a method or explicitly invoke 'call'.
@@ -183,7 +163,7 @@ Try changing 'call' to a method or explicitly invoke 'call'.
 Try changing 'call' to a method or explicitly invoke 'call'.
   a(2, \"3\");
    ^";
-  self::B* b = new self::B::•();
+  self::B b = new self::B::•();
   invalid-expression "pkg/front_end/testcases/extensions/call_methods.dart:47:4: Error: Cannot invoke an instance of 'B' because it declares 'call' to be something other than a method.
  - 'B' is from 'pkg/front_end/testcases/extensions/call_methods.dart'.
 Try changing 'call' to a method or explicitly invoke 'call'.

pkg/front_end/testcases/extensions/check_bounds.dart

@@ -1,7 +1,7 @@
 // Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// @dart=2.9
+
 part 'check_bounds_lib.dart';
 
 class A {}
@@ -17,25 +17,24 @@ extension Extension<T extends B> on Class<T> {
 
 main() {}
 
-test() {
-  A a;
-
+test(A a) {
   Class<A> classA = new Class<A>();
+  Class<B> classB = new Class<B>();
+
   classA.method(); // Expect method not found.
   Extension(classA).method(); // Expect bounds mismatch.
   Extension<A>(classA).method(); // Expect bounds mismatch.
-  Extension<B>(classA).method();
+  Extension<B>(classB).method();
   Extension(classA).genericMethod(a); // Expect bounds mismatch.
   Extension(classA).genericMethod<A>(a); // Expect bounds mismatch.
   Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
   Extension<A>(classA).genericMethod(a); // Expect bounds mismatch.
   Extension<A>(classA).genericMethod<A>(a); // Expect bounds mismatch.
   Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
-  Extension<B>(classA).genericMethod(a); // Expect bounds mismatch.
-  Extension<B>(classA).genericMethod<A>(a); // Expect bounds mismatch.
-  Extension<B>(classA).genericMethod<B>(a);
+  Extension<B>(classB).genericMethod(a); // Expect bounds mismatch.
+  Extension<B>(classB).genericMethod<A>(a); // Expect bounds mismatch.
+  Extension<B>(classB).genericMethod<B>(a);
 
-  Class<B> classB = new Class<B>();
   classB.method();
   Extension(classB).method();
   Extension<A>(classB).method(); // Expect bounds mismatch.
@@ -57,6 +56,8 @@ test() {
 
 final A a = new A();
 final Class<A> classA = new Class<A>();
+final Class<B> classB = new Class<B>();
+
 final field1 = classA.method(); // Expect method not found.
 final field2 = Extension(classA).method(); // Expect bounds mismatch.
 final field3 = Extension<A>(classA).method(); // Expect bounds mismatch.
@@ -70,12 +71,11 @@ final field9 =
 final field10 =
     Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
 final field11 =
-    Extension<B>(classA).genericMethod(a); // Expect bounds mismatch.
+    Extension<B>(classB).genericMethod(a); // Expect bounds mismatch.
 final field12 =
-    Extension<B>(classA).genericMethod<A>(a); // Expect bounds mismatch.
-final field13 = Extension<B>(classA).genericMethod<B>(a);
+    Extension<B>(classB).genericMethod<A>(a); // Expect bounds mismatch.
+final field13 = Extension<B>(classB).genericMethod<B>(a);
 
-final Class<B> classB = new Class<B>();
 final field14 = classB.method();
 final field15 = Extension(classB).method();
 final field16 = Extension<A>(classB).method(); // Expect bounds mismatch.

pkg/front_end/testcases/extensions/check_bounds.dart.textual_outline.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 part 'check_bounds_lib.dart';
 
 class A {}
@@ -13,9 +12,10 @@ extension Extension<T extends B> on Class<T> {
 }
 
 main() {}
-test() {}
+test(A a) {}
 final A a = new A();
 final Class<A> classA = new Class<A>();
+final Class<B> classB = new Class<B>();
 final field1 = classA.method();
 final field2 = Extension(classA).method();
 final field3 = Extension<A>(classA).method();
@@ -26,10 +26,9 @@ final field7 = Extension(classA).genericMethod<B>(a);
 final field8 = Extension<A>(classA).genericMethod(a);
 final field9 = Extension<A>(classA).genericMethod<A>(a);
 final field10 = Extension<A>(classA).genericMethod<B>(a);
-final field11 = Extension<B>(classA).genericMethod(a);
-final field12 = Extension<B>(classA).genericMethod<A>(a);
-final field13 = Extension<B>(classA).genericMethod<B>(a);
-final Class<B> classB = new Class<B>();
+final field11 = Extension<B>(classB).genericMethod(a);
+final field12 = Extension<B>(classB).genericMethod<A>(a);
+final field13 = Extension<B>(classB).genericMethod<B>(a);
 final field14 = classB.method();
 final field15 = Extension(classB).method();
 final field16 = Extension<A>(classB).method();

pkg/front_end/testcases/extensions/check_bounds.dart.textual_outline_modelled.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 part 'check_bounds_lib.dart';
 
 class A {}
@@ -17,9 +16,9 @@ final Class<A> classA = new Class<A>();
 final Class<B> classB = new Class<B>();
 final field1 = classA.method();
 final field10 = Extension<A>(classA).genericMethod<B>(a);
-final field11 = Extension<B>(classA).genericMethod(a);
-final field12 = Extension<B>(classA).genericMethod<A>(a);
-final field13 = Extension<B>(classA).genericMethod<B>(a);
+final field11 = Extension<B>(classB).genericMethod(a);
+final field12 = Extension<B>(classB).genericMethod<A>(a);
+final field13 = Extension<B>(classB).genericMethod<B>(a);
 final field14 = classB.method();
 final field15 = Extension(classB).method();
 final field16 = Extension<A>(classB).method();
@@ -45,4 +44,4 @@ final field7 = Extension(classA).genericMethod<B>(a);
 final field8 = Extension<A>(classA).genericMethod(a);
 final field9 = Extension<A>(classA).genericMethod<A>(a);
 main() {}
-test() {}
+test(A a) {}

pkg/front_end/testcases/extensions/check_bounds.dart.weak.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -69,6 +69,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:30:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
+//                                      ^
+//
 // pkg/front_end/testcases/extensions/check_bounds.dart:30:3: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -119,6 +125,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:33:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
+//                                         ^
+//
 // pkg/front_end/testcases/extensions/check_bounds.dart:33:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -133,7 +145,7 @@ library;
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
-//   Extension<B>(classA).genericMethod(a); // Expect bounds mismatch.
+//   Extension<B>(classB).genericMethod(a); // Expect bounds mismatch.
 //                        ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
@@ -143,13 +155,19 @@ library;
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
-//   Extension<B>(classA).genericMethod<A>(a); // Expect bounds mismatch.
+//   Extension<B>(classB).genericMethod<A>(a); // Expect bounds mismatch.
 //                        ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:41:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:36:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<B>(classB).genericMethod<B>(a);
+//                                         ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:40:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -159,7 +177,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:44:10: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:43:10: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -169,7 +187,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:45:10: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:44:10: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -179,7 +197,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:47:21: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:45:27: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   classB.genericMethod<B>(a);
+//                           ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:46:21: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -189,7 +213,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:48:21: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:47:21: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -199,7 +223,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:50:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:48:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension(classB).genericMethod<B>(a);
+//                                      ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:49:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -209,7 +239,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:50:3: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:49:3: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -219,7 +249,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:51:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:50:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -229,7 +259,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:51:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:50:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -239,7 +269,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:52:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:51:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<A>(classB).genericMethod<B>(a); // Expect bounds mismatch.
+//                                         ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:51:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -249,7 +285,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:53:24: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:52:24: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -259,7 +295,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:54:24: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:53:24: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -269,14 +305,20 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:60:23: Error: The method 'method' isn't defined for the class 'Class<A>'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:54:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<B>(classB).genericMethod<B>(a);
+//                                         ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:61:23: Error: The method 'method' isn't defined for the class 'Class<A>'.
 //  - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try correcting the name to the name of an existing method, or defining a method named 'method'.
 // final field1 = classA.method(); // Expect method not found.
 //                       ^^^^^^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:61:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:62:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -286,7 +328,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:62:16: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:63:16: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -296,41 +338,28 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:64:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:64:29: Error: The argument type 'Class<A>' can't be assigned to the parameter type 'Class<B>'.
+//  - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-// final field5 = Extension(classA).genericMethod(a); // Expect bounds mismatch.
-//                ^
-// pkg/front_end/testcases/extensions/check_bounds.dart:13:21: Context: This is the type variable whose bound isn't conformed to.
-// extension Extension<T extends B> on Class<T> {
-//                     ^
-//
-// pkg/front_end/testcases/extensions/check_bounds.dart:64:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
-//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
-//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-// final field5 = Extension(classA).genericMethod(a); // Expect bounds mismatch.
-//                ^
-// pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
-//   genericMethod<S extends B>(S s) {}
-//                 ^
+// final field4 = Extension<B>(classA).method();
+//                             ^
 //
 // pkg/front_end/testcases/extensions/check_bounds.dart:65:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
-// final field6 = Extension(classA).genericMethod<A>(a); // Expect bounds mismatch.
+// final field5 = Extension(classA).genericMethod(a); // Expect bounds mismatch.
 //                ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:13:21: Context: This is the type variable whose bound isn't conformed to.
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:65:16: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:65:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
-// Try changing type arguments so that they conform to the bounds.
-// final field6 = Extension(classA).genericMethod<A>(a); // Expect bounds mismatch.
+// Try specifying type arguments explicitly so that they conform to the bounds.
+// final field5 = Extension(classA).genericMethod(a); // Expect bounds mismatch.
 //                ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
@@ -340,13 +369,39 @@ library;
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
+// final field6 = Extension(classA).genericMethod<A>(a); // Expect bounds mismatch.
+//                ^
+// pkg/front_end/testcases/extensions/check_bounds.dart:13:21: Context: This is the type variable whose bound isn't conformed to.
+// extension Extension<T extends B> on Class<T> {
+//                     ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:66:16: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// Try changing type arguments so that they conform to the bounds.
+// final field6 = Extension(classA).genericMethod<A>(a); // Expect bounds mismatch.
+//                ^
+// pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
+//   genericMethod<S extends B>(S s) {}
+//                 ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:67:51: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// final field7 = Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
+//                                                   ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:67:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// Try specifying type arguments explicitly so that they conform to the bounds.
 // final field7 = Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
 //                ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:13:21: Context: This is the type variable whose bound isn't conformed to.
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:67:16: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:68:16: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -356,7 +411,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:67:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:68:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -366,7 +421,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:69:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:70:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -376,7 +431,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:69:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:70:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -386,7 +441,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:71:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:72:43: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//     Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
+//                                           ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:72:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -396,26 +457,32 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:73:26: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:74:26: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
-//     Extension<B>(classA).genericMethod(a); // Expect bounds mismatch.
+//     Extension<B>(classB).genericMethod(a); // Expect bounds mismatch.
 //                          ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:75:26: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:76:26: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
-//     Extension<B>(classA).genericMethod<A>(a); // Expect bounds mismatch.
+//     Extension<B>(classB).genericMethod<A>(a); // Expect bounds mismatch.
 //                          ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:77:55: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// final field13 = Extension<B>(classB).genericMethod<B>(a);
+//                                                       ^
+//
 // pkg/front_end/testcases/extensions/check_bounds.dart:81:17: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -446,6 +513,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:86:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// final field20 = classB.genericMethod<B>(a);
+//                                         ^
+//
 // pkg/front_end/testcases/extensions/check_bounds.dart:87:35: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -466,6 +539,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:90:52: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// final field23 = Extension(classB).genericMethod<B>(a);
+//                                                    ^
+//
 // pkg/front_end/testcases/extensions/check_bounds.dart:92:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -506,6 +585,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:96:43: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//     Extension<A>(classB).genericMethod<B>(a); // Expect bounds mismatch.
+//                                           ^
+//
 // pkg/front_end/testcases/extensions/check_bounds.dart:96:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -536,6 +621,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:101:55: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// final field29 = Extension<B>(classB).genericMethod<B>(a);
+//                                                       ^
+//
 // pkg/front_end/testcases/extensions/check_bounds_lib.dart:11:10: Error: The method 'method' isn't defined for the class 'Class<A>'.
 //  - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -603,6 +694,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:17:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
+//                                      ^
+//
 // pkg/front_end/testcases/extensions/check_bounds_lib.dart:17:3: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -653,6 +750,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:20:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
+//                                         ^
+//
 // pkg/front_end/testcases/extensions/check_bounds_lib.dart:20:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -667,7 +770,7 @@ library;
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
-//   Extension<B>(classA).genericMethod(a); // Expect bounds mismatch.
+//   Extension<B>(classB).genericMethod(a); // Expect bounds mismatch.
 //                        ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
@@ -677,13 +780,19 @@ library;
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
-//   Extension<B>(classA).genericMethod<A>(a); // Expect bounds mismatch.
+//   Extension<B>(classB).genericMethod<A>(a); // Expect bounds mismatch.
 //                        ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:28:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:23:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<B>(classB).genericMethod<B>(a);
+//                                         ^
+//
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:27:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -693,7 +802,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:31:10: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:30:10: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -703,7 +812,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:32:10: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:31:10: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -713,7 +822,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:34:21: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:32:27: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   classB.genericMethod<B>(a);
+//                           ^
+//
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:33:21: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -723,7 +838,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:35:21: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:34:21: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -733,7 +848,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:37:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:35:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension(classB).genericMethod<B>(a);
+//                                      ^
+//
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:36:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -743,7 +864,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:37:3: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:36:3: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -753,7 +874,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:38:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:37:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -763,7 +884,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:38:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:37:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -773,7 +894,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:39:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:38:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<A>(classB).genericMethod<B>(a); // Expect bounds mismatch.
+//                                         ^
+//
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:38:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -783,7 +910,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:40:24: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:39:24: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -793,7 +920,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:41:24: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:40:24: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -803,170 +930,243 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:41:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<B>(classB).genericMethod<B>(a);
+//                                         ^
+//
 import self as self;
 import "dart:core" as core;
 
 part check_bounds_lib.dart;
 class A extends core::Object {
-  synthetic constructor •() → self::A*
+  synthetic constructor •() → self::A
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
 class B extends self::A {
-  synthetic constructor •() → self::B*
+  synthetic constructor •() → self::B
     : super self::A::•()
     ;
 }
-class Class<T extends self::A*> extends core::Object {
-  synthetic constructor •() → self::Class<self::Class::T*>*
+class Class<T extends self::A> extends core::Object {
+  synthetic constructor •() → self::Class<self::Class::T>
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension Extension<T extends self::B*> on self::Class<T*>* {
+extension Extension<T extends self::B> on self::Class<T> {
   method method = self::Extension|method;
   tearoff method = self::Extension|get#method;
   method genericMethod = self::Extension|genericMethod;
   tearoff genericMethod = self::Extension|get#genericMethod;
 }
-static final field self::A* a = new self::A::•();
-static final field self::Class<self::A*>* classA = new self::Class::•<self::A*>();
-static final field dynamic field1 = invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:60:23: Error: The method 'method' isn't defined for the class 'Class<A>'.
+static final field self::A a = new self::A::•();
+static final field self::Class<self::A> classA = new self::Class::•<self::A>();
+static final field self::Class<self::B> classB = new self::Class::•<self::B>();
+static final field dynamic field1 = invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:61:23: Error: The method 'method' isn't defined for the class 'Class<A>'.
  - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 Try correcting the name to the name of an existing method, or defining a method named 'method'.
 final field1 = classA.method(); // Expect method not found.
                       ^^^^^^" in self::classA{<unresolved>}.method();
-static final field dynamic field2 = self::Extension|method<self::A*>(self::classA);
-static final field dynamic field3 = self::Extension|method<self::A*>(self::classA);
-static final field dynamic field4 = self::Extension|method<self::B*>(self::classA as{TypeError} self::Class<self::B*>*);
-static final field dynamic field5 = self::Extension|genericMethod<self::A*, self::A*>(self::classA, self::a);
-static final field dynamic field6 = self::Extension|genericMethod<self::A*, self::A*>(self::classA, self::a);
-static final field dynamic field7 = self::Extension|genericMethod<self::A*, self::B*>(self::classA, self::a as{TypeError} self::B*);
-static final field dynamic field8 = self::Extension|genericMethod<self::A*, self::A*>(self::classA, self::a);
-static final field dynamic field9 = self::Extension|genericMethod<self::A*, self::A*>(self::classA, self::a);
-static final field dynamic field10 = self::Extension|genericMethod<self::A*, self::B*>(self::classA, self::a as{TypeError} self::B*);
-static final field dynamic field11 = self::Extension|genericMethod<self::B*, self::A*>(self::classA as{TypeError} self::Class<self::B*>*, self::a);
-static final field dynamic field12 = self::Extension|genericMethod<self::B*, self::A*>(self::classA as{TypeError} self::Class<self::B*>*, self::a);
-static final field dynamic field13 = self::Extension|genericMethod<self::B*, self::B*>(self::classA as{TypeError} self::Class<self::B*>*, self::a as{TypeError} self::B*);
-static final field self::Class<self::B*>* classB = new self::Class::•<self::B*>();
-static final field dynamic field14 = self::Extension|method<self::B*>(self::classB);
-static final field dynamic field15 = self::Extension|method<self::B*>(self::classB);
-static final field dynamic field16 = self::Extension|method<self::A*>(self::classB);
-static final field dynamic field17 = self::Extension|method<self::B*>(self::classB);
-static final field dynamic field18 = self::Extension|genericMethod<self::B*, self::A*>(self::classB, self::a);
-static final field dynamic field19 = self::Extension|genericMethod<self::B*, self::A*>(self::classB, self::a);
-static final field dynamic field20 = self::Extension|genericMethod<self::B*, self::B*>(self::classB, self::a as{TypeError} self::B*);
-static final field dynamic field21 = self::Extension|genericMethod<self::B*, self::A*>(self::classB, self::a);
-static final field dynamic field22 = self::Extension|genericMethod<self::B*, self::A*>(self::classB, self::a);
-static final field dynamic field23 = self::Extension|genericMethod<self::B*, self::B*>(self::classB, self::a as{TypeError} self::B*);
-static final field dynamic field24 = self::Extension|genericMethod<self::A*, self::A*>(self::classB, self::a);
-static final field dynamic field25 = self::Extension|genericMethod<self::A*, self::A*>(self::classB, self::a);
-static final field dynamic field26 = self::Extension|genericMethod<self::A*, self::B*>(self::classB, self::a as{TypeError} self::B*);
-static final field dynamic field27 = self::Extension|genericMethod<self::B*, self::A*>(self::classB, self::a);
-static final field dynamic field28 = self::Extension|genericMethod<self::B*, self::A*>(self::classB, self::a);
-static final field dynamic field29 = self::Extension|genericMethod<self::B*, self::B*>(self::classB, self::a as{TypeError} self::B*);
-static method Extension|method<T extends self::B*>(lowered final self::Class<self::Extension|method::T*>* #this) → dynamic {}
-static method Extension|get#method<T extends self::B*>(lowered final self::Class<self::Extension|get#method::T*>* #this) → () →* dynamic
-  return () → dynamic => self::Extension|method<self::Extension|get#method::T*>(#this);
-static method Extension|genericMethod<T extends self::B*, S extends self::B*>(lowered final self::Class<self::Extension|genericMethod::T*>* #this, self::Extension|genericMethod::S* s) → dynamic {}
-static method Extension|get#genericMethod<T extends self::B*>(lowered final self::Class<self::Extension|get#genericMethod::T*>* #this) → <S extends self::B*>(S*) →* dynamic
-  return <S extends self::B*>(S* s) → dynamic => self::Extension|genericMethod<self::Extension|get#genericMethod::T*, S*>(#this, s);
+static final field dynamic field2 = self::Extension|method<self::A>(self::classA);
+static final field dynamic field3 = self::Extension|method<self::A>(self::classA);
+static final field dynamic field4 = self::Extension|method<self::B>(invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:64:29: Error: The argument type 'Class<A>' can't be assigned to the parameter type 'Class<B>'.
+ - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+final field4 = Extension<B>(classA).method();
+                            ^" in self::classA as{TypeError,ForNonNullableByDefault} self::Class<self::B>);
+static final field dynamic field5 = self::Extension|genericMethod<self::A, self::A>(self::classA, self::a);
+static final field dynamic field6 = self::Extension|genericMethod<self::A, self::A>(self::classA, self::a);
+static final field dynamic field7 = self::Extension|genericMethod<self::A, self::B>(self::classA, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:67:51: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+final field7 = Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
+                                                  ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static final field dynamic field8 = self::Extension|genericMethod<self::A, self::A>(self::classA, self::a);
+static final field dynamic field9 = self::Extension|genericMethod<self::A, self::A>(self::classA, self::a);
+static final field dynamic field10 = self::Extension|genericMethod<self::A, self::B>(self::classA, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:72:43: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+    Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
+                                          ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static final field dynamic field11 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field12 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field13 = self::Extension|genericMethod<self::B, self::B>(self::classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:77:55: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+final field13 = Extension<B>(classB).genericMethod<B>(a);
+                                                      ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static final field dynamic field14 = self::Extension|method<self::B>(self::classB);
+static final field dynamic field15 = self::Extension|method<self::B>(self::classB);
+static final field dynamic field16 = self::Extension|method<self::A>(self::classB);
+static final field dynamic field17 = self::Extension|method<self::B>(self::classB);
+static final field dynamic field18 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field19 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field20 = self::Extension|genericMethod<self::B, self::B>(self::classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:86:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+final field20 = classB.genericMethod<B>(a);
+                                        ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static final field dynamic field21 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field22 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field23 = self::Extension|genericMethod<self::B, self::B>(self::classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:90:52: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+final field23 = Extension(classB).genericMethod<B>(a);
+                                                   ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static final field dynamic field24 = self::Extension|genericMethod<self::A, self::A>(self::classB, self::a);
+static final field dynamic field25 = self::Extension|genericMethod<self::A, self::A>(self::classB, self::a);
+static final field dynamic field26 = self::Extension|genericMethod<self::A, self::B>(self::classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:96:43: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+    Extension<A>(classB).genericMethod<B>(a); // Expect bounds mismatch.
+                                          ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static final field dynamic field27 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field28 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field29 = self::Extension|genericMethod<self::B, self::B>(self::classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:101:55: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+final field29 = Extension<B>(classB).genericMethod<B>(a);
+                                                      ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static method Extension|method<T extends self::B>(lowered final self::Class<self::Extension|method::T> #this) → dynamic {}
+static method Extension|get#method<T extends self::B>(lowered final self::Class<self::Extension|get#method::T> #this) → () → dynamic
+  return () → dynamic => self::Extension|method<self::Extension|get#method::T>(#this);
+static method Extension|genericMethod<T extends self::B, S extends self::B>(lowered final self::Class<self::Extension|genericMethod::T> #this, self::Extension|genericMethod::S s) → dynamic {}
+static method Extension|get#genericMethod<T extends self::B>(lowered final self::Class<self::Extension|get#genericMethod::T> #this) → <S extends self::B>(S) → dynamic
+  return <S extends self::B>(S s) → dynamic => self::Extension|genericMethod<self::Extension|get#genericMethod::T, S>(#this, s);
 static method main() → dynamic {}
-static method test() → dynamic {
-  self::A* a;
-  self::Class<self::A*>* classA = new self::Class::•<self::A*>();
+static method test(self::A a) → dynamic {
+  self::Class<self::A> classA = new self::Class::•<self::A>();
+  self::Class<self::B> classB = new self::Class::•<self::B>();
   invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:24:10: Error: The method 'method' isn't defined for the class 'Class<A>'.
  - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 Try correcting the name to the name of an existing method, or defining a method named 'method'.
   classA.method(); // Expect method not found.
          ^^^^^^" in classA{<unresolved>}.method();
-  self::Extension|method<self::A*>(classA);
-  self::Extension|method<self::A*>(classA);
-  self::Extension|method<self::B*>(classA as{TypeError} self::Class<self::B*>*);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::B*>(classA, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::B*>(classA, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::B*, self::A*>(classA as{TypeError} self::Class<self::B*>*, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classA as{TypeError} self::Class<self::B*>*, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classA as{TypeError} self::Class<self::B*>*, a as{TypeError} self::B*);
-  self::Class<self::B*>* classB = new self::Class::•<self::B*>();
-  self::Extension|method<self::B*>(classB);
-  self::Extension|method<self::B*>(classB);
-  self::Extension|method<self::A*>(classB);
-  self::Extension|method<self::B*>(classB);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classB, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classB, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::A*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::A*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::A*, self::B*>(classB, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classB, a as{TypeError} self::B*);
+  self::Extension|method<self::A>(classA);
+  self::Extension|method<self::A>(classA);
+  self::Extension|method<self::B>(classB);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::B>(classA, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:30:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
+                                     ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::B>(classA, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:33:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:36:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<B>(classB).genericMethod<B>(a);
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|method<self::B>(classB);
+  self::Extension|method<self::B>(classB);
+  self::Extension|method<self::A>(classB);
+  self::Extension|method<self::B>(classB);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:45:27: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  classB.genericMethod<B>(a);
+                          ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:48:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension(classB).genericMethod<B>(a);
+                                     ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::A, self::A>(classB, a);
+  self::Extension|genericMethod<self::A, self::A>(classB, a);
+  self::Extension|genericMethod<self::A, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:51:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<A>(classB).genericMethod<B>(a); // Expect bounds mismatch.
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:54:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<B>(classB).genericMethod<B>(a);
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
 }
-static method /* from org-dartlang-testcase:///check_bounds_lib.dart */ testInPart() → dynamic {
-  self::A* a;
-  self::Class<self::A*>* classA = new self::Class::•<self::A*>();
+static method /* from org-dartlang-testcase:///check_bounds_lib.dart */ testInPart(self::A a) → dynamic {
+  self::Class<self::A> classA = new self::Class::•<self::A>();
+  self::Class<self::B> classB = new self::Class::•<self::B>();
   invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:11:10: Error: The method 'method' isn't defined for the class 'Class<A>'.
  - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 Try correcting the name to the name of an existing method, or defining a method named 'method'.
   classA.method();
          ^^^^^^" in classA{<unresolved>}.method();
-  self::Extension|method<self::A*>(classA);
-  self::Extension|method<self::A*>(classA);
-  self::Extension|method<self::B*>(classA as{TypeError} self::Class<self::B*>*);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::B*>(classA, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::B*>(classA, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::B*, self::A*>(classA as{TypeError} self::Class<self::B*>*, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classA as{TypeError} self::Class<self::B*>*, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classA as{TypeError} self::Class<self::B*>*, a as{TypeError} self::B*);
-  self::Class<self::B*>* classB = new self::Class::•<self::B*>();
-  self::Extension|method<self::B*>(classB);
-  self::Extension|method<self::B*>(classB);
-  self::Extension|method<self::A*>(classB);
-  self::Extension|method<self::B*>(classB);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classB, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classB, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::A*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::A*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::A*, self::B*>(classB, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classB, a as{TypeError} self::B*);
+  self::Extension|method<self::A>(classA);
+  self::Extension|method<self::A>(classA);
+  self::Extension|method<self::B>(classB);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::B>(classA, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:17:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
+                                     ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::B>(classA, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:20:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:23:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<B>(classB).genericMethod<B>(a);
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|method<self::B>(classB);
+  self::Extension|method<self::B>(classB);
+  self::Extension|method<self::A>(classB);
+  self::Extension|method<self::B>(classB);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:32:27: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  classB.genericMethod<B>(a);
+                          ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:35:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension(classB).genericMethod<B>(a);
+                                     ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::A, self::A>(classB, a);
+  self::Extension|genericMethod<self::A, self::A>(classB, a);
+  self::Extension|genericMethod<self::A, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:38:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<A>(classB).genericMethod<B>(a); // Expect bounds mismatch.
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:41:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<B>(classB).genericMethod<B>(a);
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
 }

pkg/front_end/testcases/extensions/check_bounds.dart.weak.modular.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -69,6 +69,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:30:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
+//                                      ^
+//
 // pkg/front_end/testcases/extensions/check_bounds.dart:30:3: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -119,6 +125,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:33:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
+//                                         ^
+//
 // pkg/front_end/testcases/extensions/check_bounds.dart:33:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -133,7 +145,7 @@ library;
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
-//   Extension<B>(classA).genericMethod(a); // Expect bounds mismatch.
+//   Extension<B>(classB).genericMethod(a); // Expect bounds mismatch.
 //                        ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
@@ -143,13 +155,19 @@ library;
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
-//   Extension<B>(classA).genericMethod<A>(a); // Expect bounds mismatch.
+//   Extension<B>(classB).genericMethod<A>(a); // Expect bounds mismatch.
 //                        ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:41:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:36:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<B>(classB).genericMethod<B>(a);
+//                                         ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:40:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -159,7 +177,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:44:10: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:43:10: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -169,7 +187,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:45:10: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:44:10: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -179,7 +197,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:47:21: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:45:27: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   classB.genericMethod<B>(a);
+//                           ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:46:21: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -189,7 +213,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:48:21: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:47:21: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -199,7 +223,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:50:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:48:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension(classB).genericMethod<B>(a);
+//                                      ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:49:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -209,7 +239,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:50:3: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:49:3: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -219,7 +249,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:51:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:50:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -229,7 +259,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:51:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:50:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -239,7 +269,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:52:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:51:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<A>(classB).genericMethod<B>(a); // Expect bounds mismatch.
+//                                         ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:51:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -249,7 +285,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:53:24: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:52:24: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -259,7 +295,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:54:24: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:53:24: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -269,14 +305,20 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:60:23: Error: The method 'method' isn't defined for the class 'Class<A>'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:54:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<B>(classB).genericMethod<B>(a);
+//                                         ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:61:23: Error: The method 'method' isn't defined for the class 'Class<A>'.
 //  - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try correcting the name to the name of an existing method, or defining a method named 'method'.
 // final field1 = classA.method(); // Expect method not found.
 //                       ^^^^^^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:61:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:62:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -286,7 +328,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:62:16: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:63:16: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -296,41 +338,28 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:64:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:64:29: Error: The argument type 'Class<A>' can't be assigned to the parameter type 'Class<B>'.
+//  - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-// final field5 = Extension(classA).genericMethod(a); // Expect bounds mismatch.
-//                ^
-// pkg/front_end/testcases/extensions/check_bounds.dart:13:21: Context: This is the type variable whose bound isn't conformed to.
-// extension Extension<T extends B> on Class<T> {
-//                     ^
-//
-// pkg/front_end/testcases/extensions/check_bounds.dart:64:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
-//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
-//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-// final field5 = Extension(classA).genericMethod(a); // Expect bounds mismatch.
-//                ^
-// pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
-//   genericMethod<S extends B>(S s) {}
-//                 ^
+// final field4 = Extension<B>(classA).method();
+//                             ^
 //
 // pkg/front_end/testcases/extensions/check_bounds.dart:65:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
-// final field6 = Extension(classA).genericMethod<A>(a); // Expect bounds mismatch.
+// final field5 = Extension(classA).genericMethod(a); // Expect bounds mismatch.
 //                ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:13:21: Context: This is the type variable whose bound isn't conformed to.
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:65:16: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:65:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
-// Try changing type arguments so that they conform to the bounds.
-// final field6 = Extension(classA).genericMethod<A>(a); // Expect bounds mismatch.
+// Try specifying type arguments explicitly so that they conform to the bounds.
+// final field5 = Extension(classA).genericMethod(a); // Expect bounds mismatch.
 //                ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
@@ -340,13 +369,39 @@ library;
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
+// final field6 = Extension(classA).genericMethod<A>(a); // Expect bounds mismatch.
+//                ^
+// pkg/front_end/testcases/extensions/check_bounds.dart:13:21: Context: This is the type variable whose bound isn't conformed to.
+// extension Extension<T extends B> on Class<T> {
+//                     ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:66:16: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// Try changing type arguments so that they conform to the bounds.
+// final field6 = Extension(classA).genericMethod<A>(a); // Expect bounds mismatch.
+//                ^
+// pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
+//   genericMethod<S extends B>(S s) {}
+//                 ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:67:51: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// final field7 = Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
+//                                                   ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:67:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// Try specifying type arguments explicitly so that they conform to the bounds.
 // final field7 = Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
 //                ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:13:21: Context: This is the type variable whose bound isn't conformed to.
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:67:16: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:68:16: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -356,7 +411,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:67:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:68:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -366,7 +421,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:69:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:70:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -376,7 +431,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:69:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:70:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -386,7 +441,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:71:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:72:43: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//     Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
+//                                           ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:72:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -396,26 +457,32 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:73:26: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:74:26: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
-//     Extension<B>(classA).genericMethod(a); // Expect bounds mismatch.
+//     Extension<B>(classB).genericMethod(a); // Expect bounds mismatch.
 //                          ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:75:26: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:76:26: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
-//     Extension<B>(classA).genericMethod<A>(a); // Expect bounds mismatch.
+//     Extension<B>(classB).genericMethod<A>(a); // Expect bounds mismatch.
 //                          ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:77:55: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// final field13 = Extension<B>(classB).genericMethod<B>(a);
+//                                                       ^
+//
 // pkg/front_end/testcases/extensions/check_bounds.dart:81:17: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -446,6 +513,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:86:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// final field20 = classB.genericMethod<B>(a);
+//                                         ^
+//
 // pkg/front_end/testcases/extensions/check_bounds.dart:87:35: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -466,6 +539,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:90:52: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// final field23 = Extension(classB).genericMethod<B>(a);
+//                                                    ^
+//
 // pkg/front_end/testcases/extensions/check_bounds.dart:92:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -506,6 +585,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:96:43: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//     Extension<A>(classB).genericMethod<B>(a); // Expect bounds mismatch.
+//                                           ^
+//
 // pkg/front_end/testcases/extensions/check_bounds.dart:96:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -536,6 +621,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:101:55: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// final field29 = Extension<B>(classB).genericMethod<B>(a);
+//                                                       ^
+//
 // pkg/front_end/testcases/extensions/check_bounds_lib.dart:11:10: Error: The method 'method' isn't defined for the class 'Class<A>'.
 //  - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -603,6 +694,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:17:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
+//                                      ^
+//
 // pkg/front_end/testcases/extensions/check_bounds_lib.dart:17:3: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -653,6 +750,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:20:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
+//                                         ^
+//
 // pkg/front_end/testcases/extensions/check_bounds_lib.dart:20:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -667,7 +770,7 @@ library;
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
-//   Extension<B>(classA).genericMethod(a); // Expect bounds mismatch.
+//   Extension<B>(classB).genericMethod(a); // Expect bounds mismatch.
 //                        ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
@@ -677,13 +780,19 @@ library;
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
-//   Extension<B>(classA).genericMethod<A>(a); // Expect bounds mismatch.
+//   Extension<B>(classB).genericMethod<A>(a); // Expect bounds mismatch.
 //                        ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:28:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:23:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<B>(classB).genericMethod<B>(a);
+//                                         ^
+//
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:27:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -693,7 +802,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:31:10: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:30:10: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -703,7 +812,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:32:10: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:31:10: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -713,7 +822,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:34:21: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:32:27: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   classB.genericMethod<B>(a);
+//                           ^
+//
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:33:21: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -723,7 +838,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:35:21: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:34:21: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -733,7 +848,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:37:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:35:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension(classB).genericMethod<B>(a);
+//                                      ^
+//
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:36:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -743,7 +864,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:37:3: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:36:3: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -753,7 +874,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:38:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:37:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -763,7 +884,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:38:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:37:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -773,7 +894,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:39:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:38:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<A>(classB).genericMethod<B>(a); // Expect bounds mismatch.
+//                                         ^
+//
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:38:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -783,7 +910,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:40:24: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:39:24: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -793,7 +920,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:41:24: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:40:24: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -803,170 +930,243 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:41:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<B>(classB).genericMethod<B>(a);
+//                                         ^
+//
 import self as self;
 import "dart:core" as core;
 
 part check_bounds_lib.dart;
 class A extends core::Object {
-  synthetic constructor •() → self::A*
+  synthetic constructor •() → self::A
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
 class B extends self::A {
-  synthetic constructor •() → self::B*
+  synthetic constructor •() → self::B
     : super self::A::•()
     ;
 }
-class Class<T extends self::A*> extends core::Object {
-  synthetic constructor •() → self::Class<self::Class::T*>*
+class Class<T extends self::A> extends core::Object {
+  synthetic constructor •() → self::Class<self::Class::T>
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension Extension<T extends self::B*> on self::Class<T*>* {
+extension Extension<T extends self::B> on self::Class<T> {
   method method = self::Extension|method;
   tearoff method = self::Extension|get#method;
   method genericMethod = self::Extension|genericMethod;
   tearoff genericMethod = self::Extension|get#genericMethod;
 }
-static final field self::A* a = new self::A::•();
-static final field self::Class<self::A*>* classA = new self::Class::•<self::A*>();
-static final field dynamic field1 = invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:60:23: Error: The method 'method' isn't defined for the class 'Class<A>'.
+static final field self::A a = new self::A::•();
+static final field self::Class<self::A> classA = new self::Class::•<self::A>();
+static final field self::Class<self::B> classB = new self::Class::•<self::B>();
+static final field dynamic field1 = invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:61:23: Error: The method 'method' isn't defined for the class 'Class<A>'.
  - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 Try correcting the name to the name of an existing method, or defining a method named 'method'.
 final field1 = classA.method(); // Expect method not found.
                       ^^^^^^" in self::classA{<unresolved>}.method();
-static final field dynamic field2 = self::Extension|method<self::A*>(self::classA);
-static final field dynamic field3 = self::Extension|method<self::A*>(self::classA);
-static final field dynamic field4 = self::Extension|method<self::B*>(self::classA as{TypeError} self::Class<self::B*>*);
-static final field dynamic field5 = self::Extension|genericMethod<self::A*, self::A*>(self::classA, self::a);
-static final field dynamic field6 = self::Extension|genericMethod<self::A*, self::A*>(self::classA, self::a);
-static final field dynamic field7 = self::Extension|genericMethod<self::A*, self::B*>(self::classA, self::a as{TypeError} self::B*);
-static final field dynamic field8 = self::Extension|genericMethod<self::A*, self::A*>(self::classA, self::a);
-static final field dynamic field9 = self::Extension|genericMethod<self::A*, self::A*>(self::classA, self::a);
-static final field dynamic field10 = self::Extension|genericMethod<self::A*, self::B*>(self::classA, self::a as{TypeError} self::B*);
-static final field dynamic field11 = self::Extension|genericMethod<self::B*, self::A*>(self::classA as{TypeError} self::Class<self::B*>*, self::a);
-static final field dynamic field12 = self::Extension|genericMethod<self::B*, self::A*>(self::classA as{TypeError} self::Class<self::B*>*, self::a);
-static final field dynamic field13 = self::Extension|genericMethod<self::B*, self::B*>(self::classA as{TypeError} self::Class<self::B*>*, self::a as{TypeError} self::B*);
-static final field self::Class<self::B*>* classB = new self::Class::•<self::B*>();
-static final field dynamic field14 = self::Extension|method<self::B*>(self::classB);
-static final field dynamic field15 = self::Extension|method<self::B*>(self::classB);
-static final field dynamic field16 = self::Extension|method<self::A*>(self::classB);
-static final field dynamic field17 = self::Extension|method<self::B*>(self::classB);
-static final field dynamic field18 = self::Extension|genericMethod<self::B*, self::A*>(self::classB, self::a);
-static final field dynamic field19 = self::Extension|genericMethod<self::B*, self::A*>(self::classB, self::a);
-static final field dynamic field20 = self::Extension|genericMethod<self::B*, self::B*>(self::classB, self::a as{TypeError} self::B*);
-static final field dynamic field21 = self::Extension|genericMethod<self::B*, self::A*>(self::classB, self::a);
-static final field dynamic field22 = self::Extension|genericMethod<self::B*, self::A*>(self::classB, self::a);
-static final field dynamic field23 = self::Extension|genericMethod<self::B*, self::B*>(self::classB, self::a as{TypeError} self::B*);
-static final field dynamic field24 = self::Extension|genericMethod<self::A*, self::A*>(self::classB, self::a);
-static final field dynamic field25 = self::Extension|genericMethod<self::A*, self::A*>(self::classB, self::a);
-static final field dynamic field26 = self::Extension|genericMethod<self::A*, self::B*>(self::classB, self::a as{TypeError} self::B*);
-static final field dynamic field27 = self::Extension|genericMethod<self::B*, self::A*>(self::classB, self::a);
-static final field dynamic field28 = self::Extension|genericMethod<self::B*, self::A*>(self::classB, self::a);
-static final field dynamic field29 = self::Extension|genericMethod<self::B*, self::B*>(self::classB, self::a as{TypeError} self::B*);
-static method Extension|method<T extends self::B*>(lowered final self::Class<self::Extension|method::T*>* #this) → dynamic {}
-static method Extension|get#method<T extends self::B*>(lowered final self::Class<self::Extension|get#method::T*>* #this) → () →* dynamic
-  return () → dynamic => self::Extension|method<self::Extension|get#method::T*>(#this);
-static method Extension|genericMethod<T extends self::B*, S extends self::B*>(lowered final self::Class<self::Extension|genericMethod::T*>* #this, self::Extension|genericMethod::S* s) → dynamic {}
-static method Extension|get#genericMethod<T extends self::B*>(lowered final self::Class<self::Extension|get#genericMethod::T*>* #this) → <S extends self::B*>(S*) →* dynamic
-  return <S extends self::B*>(S* s) → dynamic => self::Extension|genericMethod<self::Extension|get#genericMethod::T*, S*>(#this, s);
+static final field dynamic field2 = self::Extension|method<self::A>(self::classA);
+static final field dynamic field3 = self::Extension|method<self::A>(self::classA);
+static final field dynamic field4 = self::Extension|method<self::B>(invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:64:29: Error: The argument type 'Class<A>' can't be assigned to the parameter type 'Class<B>'.
+ - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+final field4 = Extension<B>(classA).method();
+                            ^" in self::classA as{TypeError,ForNonNullableByDefault} self::Class<self::B>);
+static final field dynamic field5 = self::Extension|genericMethod<self::A, self::A>(self::classA, self::a);
+static final field dynamic field6 = self::Extension|genericMethod<self::A, self::A>(self::classA, self::a);
+static final field dynamic field7 = self::Extension|genericMethod<self::A, self::B>(self::classA, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:67:51: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+final field7 = Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
+                                                  ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static final field dynamic field8 = self::Extension|genericMethod<self::A, self::A>(self::classA, self::a);
+static final field dynamic field9 = self::Extension|genericMethod<self::A, self::A>(self::classA, self::a);
+static final field dynamic field10 = self::Extension|genericMethod<self::A, self::B>(self::classA, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:72:43: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+    Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
+                                          ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static final field dynamic field11 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field12 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field13 = self::Extension|genericMethod<self::B, self::B>(self::classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:77:55: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+final field13 = Extension<B>(classB).genericMethod<B>(a);
+                                                      ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static final field dynamic field14 = self::Extension|method<self::B>(self::classB);
+static final field dynamic field15 = self::Extension|method<self::B>(self::classB);
+static final field dynamic field16 = self::Extension|method<self::A>(self::classB);
+static final field dynamic field17 = self::Extension|method<self::B>(self::classB);
+static final field dynamic field18 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field19 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field20 = self::Extension|genericMethod<self::B, self::B>(self::classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:86:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+final field20 = classB.genericMethod<B>(a);
+                                        ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static final field dynamic field21 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field22 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field23 = self::Extension|genericMethod<self::B, self::B>(self::classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:90:52: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+final field23 = Extension(classB).genericMethod<B>(a);
+                                                   ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static final field dynamic field24 = self::Extension|genericMethod<self::A, self::A>(self::classB, self::a);
+static final field dynamic field25 = self::Extension|genericMethod<self::A, self::A>(self::classB, self::a);
+static final field dynamic field26 = self::Extension|genericMethod<self::A, self::B>(self::classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:96:43: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+    Extension<A>(classB).genericMethod<B>(a); // Expect bounds mismatch.
+                                          ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static final field dynamic field27 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field28 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field29 = self::Extension|genericMethod<self::B, self::B>(self::classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:101:55: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+final field29 = Extension<B>(classB).genericMethod<B>(a);
+                                                      ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static method Extension|method<T extends self::B>(lowered final self::Class<self::Extension|method::T> #this) → dynamic {}
+static method Extension|get#method<T extends self::B>(lowered final self::Class<self::Extension|get#method::T> #this) → () → dynamic
+  return () → dynamic => self::Extension|method<self::Extension|get#method::T>(#this);
+static method Extension|genericMethod<T extends self::B, S extends self::B>(lowered final self::Class<self::Extension|genericMethod::T> #this, self::Extension|genericMethod::S s) → dynamic {}
+static method Extension|get#genericMethod<T extends self::B>(lowered final self::Class<self::Extension|get#genericMethod::T> #this) → <S extends self::B>(S) → dynamic
+  return <S extends self::B>(S s) → dynamic => self::Extension|genericMethod<self::Extension|get#genericMethod::T, S>(#this, s);
 static method main() → dynamic {}
-static method test() → dynamic {
-  self::A* a;
-  self::Class<self::A*>* classA = new self::Class::•<self::A*>();
+static method test(self::A a) → dynamic {
+  self::Class<self::A> classA = new self::Class::•<self::A>();
+  self::Class<self::B> classB = new self::Class::•<self::B>();
   invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:24:10: Error: The method 'method' isn't defined for the class 'Class<A>'.
  - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 Try correcting the name to the name of an existing method, or defining a method named 'method'.
   classA.method(); // Expect method not found.
          ^^^^^^" in classA{<unresolved>}.method();
-  self::Extension|method<self::A*>(classA);
-  self::Extension|method<self::A*>(classA);
-  self::Extension|method<self::B*>(classA as{TypeError} self::Class<self::B*>*);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::B*>(classA, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::B*>(classA, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::B*, self::A*>(classA as{TypeError} self::Class<self::B*>*, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classA as{TypeError} self::Class<self::B*>*, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classA as{TypeError} self::Class<self::B*>*, a as{TypeError} self::B*);
-  self::Class<self::B*>* classB = new self::Class::•<self::B*>();
-  self::Extension|method<self::B*>(classB);
-  self::Extension|method<self::B*>(classB);
-  self::Extension|method<self::A*>(classB);
-  self::Extension|method<self::B*>(classB);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classB, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classB, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::A*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::A*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::A*, self::B*>(classB, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classB, a as{TypeError} self::B*);
+  self::Extension|method<self::A>(classA);
+  self::Extension|method<self::A>(classA);
+  self::Extension|method<self::B>(classB);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::B>(classA, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:30:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
+                                     ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::B>(classA, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:33:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:36:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<B>(classB).genericMethod<B>(a);
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|method<self::B>(classB);
+  self::Extension|method<self::B>(classB);
+  self::Extension|method<self::A>(classB);
+  self::Extension|method<self::B>(classB);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:45:27: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  classB.genericMethod<B>(a);
+                          ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:48:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension(classB).genericMethod<B>(a);
+                                     ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::A, self::A>(classB, a);
+  self::Extension|genericMethod<self::A, self::A>(classB, a);
+  self::Extension|genericMethod<self::A, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:51:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<A>(classB).genericMethod<B>(a); // Expect bounds mismatch.
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:54:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<B>(classB).genericMethod<B>(a);
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
 }
-static method /* from org-dartlang-testcase:///check_bounds_lib.dart */ testInPart() → dynamic {
-  self::A* a;
-  self::Class<self::A*>* classA = new self::Class::•<self::A*>();
+static method /* from org-dartlang-testcase:///check_bounds_lib.dart */ testInPart(self::A a) → dynamic {
+  self::Class<self::A> classA = new self::Class::•<self::A>();
+  self::Class<self::B> classB = new self::Class::•<self::B>();
   invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:11:10: Error: The method 'method' isn't defined for the class 'Class<A>'.
  - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 Try correcting the name to the name of an existing method, or defining a method named 'method'.
   classA.method();
          ^^^^^^" in classA{<unresolved>}.method();
-  self::Extension|method<self::A*>(classA);
-  self::Extension|method<self::A*>(classA);
-  self::Extension|method<self::B*>(classA as{TypeError} self::Class<self::B*>*);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::B*>(classA, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::B*>(classA, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::B*, self::A*>(classA as{TypeError} self::Class<self::B*>*, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classA as{TypeError} self::Class<self::B*>*, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classA as{TypeError} self::Class<self::B*>*, a as{TypeError} self::B*);
-  self::Class<self::B*>* classB = new self::Class::•<self::B*>();
-  self::Extension|method<self::B*>(classB);
-  self::Extension|method<self::B*>(classB);
-  self::Extension|method<self::A*>(classB);
-  self::Extension|method<self::B*>(classB);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classB, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classB, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::A*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::A*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::A*, self::B*>(classB, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classB, a as{TypeError} self::B*);
+  self::Extension|method<self::A>(classA);
+  self::Extension|method<self::A>(classA);
+  self::Extension|method<self::B>(classB);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::B>(classA, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:17:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
+                                     ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::B>(classA, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:20:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:23:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<B>(classB).genericMethod<B>(a);
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|method<self::B>(classB);
+  self::Extension|method<self::B>(classB);
+  self::Extension|method<self::A>(classB);
+  self::Extension|method<self::B>(classB);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:32:27: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  classB.genericMethod<B>(a);
+                          ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:35:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension(classB).genericMethod<B>(a);
+                                     ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::A, self::A>(classB, a);
+  self::Extension|genericMethod<self::A, self::A>(classB, a);
+  self::Extension|genericMethod<self::A, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:38:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<A>(classB).genericMethod<B>(a); // Expect bounds mismatch.
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:41:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<B>(classB).genericMethod<B>(a);
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
 }

pkg/front_end/testcases/extensions/check_bounds.dart.weak.outline.expect

@@ -1,48 +1,29 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 part check_bounds_lib.dart;
 class A extends core::Object {
-  synthetic constructor •() → self::A*
+  synthetic constructor •() → self::A
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
 class B extends self::A {
-  synthetic constructor •() → self::B*
+  synthetic constructor •() → self::B
     ;
 }
-class Class<T extends self::A*> extends core::Object {
-  synthetic constructor •() → self::Class<self::Class::T*>*
+class Class<T extends self::A> extends core::Object {
+  synthetic constructor •() → self::Class<self::Class::T>
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension Extension<T extends self::B*> on self::Class<T*>* {
+extension Extension<T extends self::B> on self::Class<T> {
   method method = self::Extension|method;
   tearoff method = self::Extension|get#method;
   method genericMethod = self::Extension|genericMethod;
   tearoff genericMethod = self::Extension|get#genericMethod;
 }
-static final field self::A* a;
-static final field self::Class<self::A*>* classA;
+static final field self::A a;
+static final field self::Class<self::A> classA;
+static final field self::Class<self::B> classB;
 static final field dynamic field1;
 static final field dynamic field2;
 static final field dynamic field3;
@@ -56,7 +37,6 @@ static final field dynamic field10;
 static final field dynamic field11;
 static final field dynamic field12;
 static final field dynamic field13;
-static final field self::Class<self::B*>* classB;
 static final field dynamic field14;
 static final field dynamic field15;
 static final field dynamic field16;
@@ -73,17 +53,17 @@ static final field dynamic field26;
 static final field dynamic field27;
 static final field dynamic field28;
 static final field dynamic field29;
-static method Extension|method<T extends self::B*>(lowered final self::Class<self::Extension|method::T*>* #this) → dynamic
+static method Extension|method<T extends self::B>(lowered final self::Class<self::Extension|method::T> #this) → dynamic
   ;
-static method Extension|get#method<T extends self::B*>(lowered final self::Class<self::Extension|get#method::T*>* #this) → () →* dynamic
-  return () → dynamic => self::Extension|method<self::Extension|get#method::T*>(#this);
-static method Extension|genericMethod<T extends self::B*, S extends self::B*>(lowered final self::Class<self::Extension|genericMethod::T*>* #this, self::Extension|genericMethod::S* s) → dynamic
+static method Extension|get#method<T extends self::B>(lowered final self::Class<self::Extension|get#method::T> #this) → () → dynamic
+  return () → dynamic => self::Extension|method<self::Extension|get#method::T>(#this);
+static method Extension|genericMethod<T extends self::B, S extends self::B>(lowered final self::Class<self::Extension|genericMethod::T> #this, self::Extension|genericMethod::S s) → dynamic
   ;
-static method Extension|get#genericMethod<T extends self::B*>(lowered final self::Class<self::Extension|get#genericMethod::T*>* #this) → <S extends self::B*>(S*) →* dynamic
-  return <S extends self::B*>(S* s) → dynamic => self::Extension|genericMethod<self::Extension|get#genericMethod::T*, S*>(#this, s);
+static method Extension|get#genericMethod<T extends self::B>(lowered final self::Class<self::Extension|get#genericMethod::T> #this) → <S extends self::B>(S) → dynamic
+  return <S extends self::B>(S s) → dynamic => self::Extension|genericMethod<self::Extension|get#genericMethod::T, S>(#this, s);
 static method main() → dynamic
   ;
-static method test() → dynamic
+static method test(self::A a) → dynamic
   ;
-static method /* from org-dartlang-testcase:///check_bounds_lib.dart */ testInPart() → dynamic
+static method /* from org-dartlang-testcase:///check_bounds_lib.dart */ testInPart(self::A a) → dynamic
   ;

pkg/front_end/testcases/extensions/check_bounds.dart.weak.transformed.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -69,6 +69,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:30:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
+//                                      ^
+//
 // pkg/front_end/testcases/extensions/check_bounds.dart:30:3: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -119,6 +125,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:33:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
+//                                         ^
+//
 // pkg/front_end/testcases/extensions/check_bounds.dart:33:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -133,7 +145,7 @@ library;
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
-//   Extension<B>(classA).genericMethod(a); // Expect bounds mismatch.
+//   Extension<B>(classB).genericMethod(a); // Expect bounds mismatch.
 //                        ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
@@ -143,13 +155,19 @@ library;
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
-//   Extension<B>(classA).genericMethod<A>(a); // Expect bounds mismatch.
+//   Extension<B>(classB).genericMethod<A>(a); // Expect bounds mismatch.
 //                        ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:41:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:36:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<B>(classB).genericMethod<B>(a);
+//                                         ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:40:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -159,7 +177,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:44:10: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:43:10: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -169,7 +187,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:45:10: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:44:10: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -179,7 +197,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:47:21: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:45:27: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   classB.genericMethod<B>(a);
+//                           ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:46:21: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -189,7 +213,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:48:21: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:47:21: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -199,7 +223,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:50:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:48:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension(classB).genericMethod<B>(a);
+//                                      ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:49:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -209,7 +239,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:50:3: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:49:3: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -219,7 +249,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:51:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:50:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -229,7 +259,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:51:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:50:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -239,7 +269,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:52:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:51:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<A>(classB).genericMethod<B>(a); // Expect bounds mismatch.
+//                                         ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:51:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -249,7 +285,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:53:24: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:52:24: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -259,7 +295,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:54:24: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:53:24: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -269,14 +305,20 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:60:23: Error: The method 'method' isn't defined for the class 'Class<A>'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:54:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<B>(classB).genericMethod<B>(a);
+//                                         ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:61:23: Error: The method 'method' isn't defined for the class 'Class<A>'.
 //  - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try correcting the name to the name of an existing method, or defining a method named 'method'.
 // final field1 = classA.method(); // Expect method not found.
 //                       ^^^^^^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:61:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:62:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -286,7 +328,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:62:16: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:63:16: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -296,41 +338,28 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:64:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:64:29: Error: The argument type 'Class<A>' can't be assigned to the parameter type 'Class<B>'.
+//  - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-// final field5 = Extension(classA).genericMethod(a); // Expect bounds mismatch.
-//                ^
-// pkg/front_end/testcases/extensions/check_bounds.dart:13:21: Context: This is the type variable whose bound isn't conformed to.
-// extension Extension<T extends B> on Class<T> {
-//                     ^
-//
-// pkg/front_end/testcases/extensions/check_bounds.dart:64:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
-//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
-//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-// final field5 = Extension(classA).genericMethod(a); // Expect bounds mismatch.
-//                ^
-// pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
-//   genericMethod<S extends B>(S s) {}
-//                 ^
+// final field4 = Extension<B>(classA).method();
+//                             ^
 //
 // pkg/front_end/testcases/extensions/check_bounds.dart:65:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
-// final field6 = Extension(classA).genericMethod<A>(a); // Expect bounds mismatch.
+// final field5 = Extension(classA).genericMethod(a); // Expect bounds mismatch.
 //                ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:13:21: Context: This is the type variable whose bound isn't conformed to.
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:65:16: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:65:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
-// Try changing type arguments so that they conform to the bounds.
-// final field6 = Extension(classA).genericMethod<A>(a); // Expect bounds mismatch.
+// Try specifying type arguments explicitly so that they conform to the bounds.
+// final field5 = Extension(classA).genericMethod(a); // Expect bounds mismatch.
 //                ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
@@ -340,13 +369,39 @@ library;
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
+// final field6 = Extension(classA).genericMethod<A>(a); // Expect bounds mismatch.
+//                ^
+// pkg/front_end/testcases/extensions/check_bounds.dart:13:21: Context: This is the type variable whose bound isn't conformed to.
+// extension Extension<T extends B> on Class<T> {
+//                     ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:66:16: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// Try changing type arguments so that they conform to the bounds.
+// final field6 = Extension(classA).genericMethod<A>(a); // Expect bounds mismatch.
+//                ^
+// pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
+//   genericMethod<S extends B>(S s) {}
+//                 ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:67:51: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// final field7 = Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
+//                                                   ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:67:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// Try specifying type arguments explicitly so that they conform to the bounds.
 // final field7 = Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
 //                ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:13:21: Context: This is the type variable whose bound isn't conformed to.
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:67:16: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:68:16: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -356,7 +411,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:67:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:68:16: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -366,7 +421,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:69:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:70:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -376,7 +431,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:69:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:70:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -386,7 +441,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:71:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:72:43: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//     Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
+//                                           ^
+//
+// pkg/front_end/testcases/extensions/check_bounds.dart:72:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -396,26 +457,32 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:73:26: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:74:26: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
-//     Extension<B>(classA).genericMethod(a); // Expect bounds mismatch.
+//     Extension<B>(classB).genericMethod(a); // Expect bounds mismatch.
 //                          ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds.dart:75:26: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds.dart:76:26: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
-//     Extension<B>(classA).genericMethod<A>(a); // Expect bounds mismatch.
+//     Extension<B>(classB).genericMethod<A>(a); // Expect bounds mismatch.
 //                          ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:77:55: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// final field13 = Extension<B>(classB).genericMethod<B>(a);
+//                                                       ^
+//
 // pkg/front_end/testcases/extensions/check_bounds.dart:81:17: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -446,6 +513,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:86:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// final field20 = classB.genericMethod<B>(a);
+//                                         ^
+//
 // pkg/front_end/testcases/extensions/check_bounds.dart:87:35: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -466,6 +539,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:90:52: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// final field23 = Extension(classB).genericMethod<B>(a);
+//                                                    ^
+//
 // pkg/front_end/testcases/extensions/check_bounds.dart:92:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -506,6 +585,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:96:43: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//     Extension<A>(classB).genericMethod<B>(a); // Expect bounds mismatch.
+//                                           ^
+//
 // pkg/front_end/testcases/extensions/check_bounds.dart:96:5: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -536,6 +621,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds.dart:101:55: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+// final field29 = Extension<B>(classB).genericMethod<B>(a);
+//                                                       ^
+//
 // pkg/front_end/testcases/extensions/check_bounds_lib.dart:11:10: Error: The method 'method' isn't defined for the class 'Class<A>'.
 //  - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -603,6 +694,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:17:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
+//                                      ^
+//
 // pkg/front_end/testcases/extensions/check_bounds_lib.dart:17:3: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -653,6 +750,12 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:20:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
+//                                         ^
+//
 // pkg/front_end/testcases/extensions/check_bounds_lib.dart:20:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
@@ -667,7 +770,7 @@ library;
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
-//   Extension<B>(classA).genericMethod(a); // Expect bounds mismatch.
+//   Extension<B>(classB).genericMethod(a); // Expect bounds mismatch.
 //                        ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
@@ -677,13 +780,19 @@ library;
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
-//   Extension<B>(classA).genericMethod<A>(a); // Expect bounds mismatch.
+//   Extension<B>(classB).genericMethod<A>(a); // Expect bounds mismatch.
 //                        ^
 // pkg/front_end/testcases/extensions/check_bounds.dart:15:17: Context: This is the type variable whose bound isn't conformed to.
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:28:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:23:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<B>(classB).genericMethod<B>(a);
+//                                         ^
+//
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:27:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|method'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -693,7 +802,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:31:10: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:30:10: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -703,7 +812,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:32:10: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:31:10: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -713,7 +822,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:34:21: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:32:27: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   classB.genericMethod<B>(a);
+//                           ^
+//
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:33:21: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -723,7 +838,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:35:21: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:34:21: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -733,7 +848,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:37:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:35:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension(classB).genericMethod<B>(a);
+//                                      ^
+//
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:36:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -743,7 +864,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:37:3: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:36:3: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -753,7 +874,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:38:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:37:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -763,7 +884,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:38:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:37:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -773,7 +894,13 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:39:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:38:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<A>(classB).genericMethod<B>(a); // Expect bounds mismatch.
+//                                         ^
+//
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:38:3: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'T' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -783,7 +910,7 @@ library;
 // extension Extension<T extends B> on Class<T> {
 //                     ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:40:24: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:39:24: Error: Inferred type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -793,7 +920,7 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
-// pkg/front_end/testcases/extensions/check_bounds_lib.dart:41:24: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:40:24: Error: Type argument 'A' doesn't conform to the bound 'B' of the type variable 'S' on 'Extension|genericMethod'.
 //  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 //  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 // Try changing type arguments so that they conform to the bounds.
@@ -803,170 +930,243 @@ library;
 //   genericMethod<S extends B>(S s) {}
 //                 ^
 //
+// pkg/front_end/testcases/extensions/check_bounds_lib.dart:41:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+//  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//  - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+//   Extension<B>(classB).genericMethod<B>(a);
+//                                         ^
+//
 import self as self;
 import "dart:core" as core;
 
 part check_bounds_lib.dart;
 class A extends core::Object {
-  synthetic constructor •() → self::A*
+  synthetic constructor •() → self::A
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
 class B extends self::A {
-  synthetic constructor •() → self::B*
+  synthetic constructor •() → self::B
     : super self::A::•()
     ;
 }
-class Class<T extends self::A*> extends core::Object {
-  synthetic constructor •() → self::Class<self::Class::T*>*
+class Class<T extends self::A> extends core::Object {
+  synthetic constructor •() → self::Class<self::Class::T>
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension Extension<T extends self::B*> on self::Class<T*>* {
+extension Extension<T extends self::B> on self::Class<T> {
   method method = self::Extension|method;
   tearoff method = self::Extension|get#method;
   method genericMethod = self::Extension|genericMethod;
   tearoff genericMethod = self::Extension|get#genericMethod;
 }
-static final field self::A* a = new self::A::•();
-static final field self::Class<self::A*>* classA = new self::Class::•<self::A*>();
-static final field dynamic field1 = invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:60:23: Error: The method 'method' isn't defined for the class 'Class<A>'.
+static final field self::A a = new self::A::•();
+static final field self::Class<self::A> classA = new self::Class::•<self::A>();
+static final field self::Class<self::B> classB = new self::Class::•<self::B>();
+static final field dynamic field1 = invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:61:23: Error: The method 'method' isn't defined for the class 'Class<A>'.
  - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 Try correcting the name to the name of an existing method, or defining a method named 'method'.
 final field1 = classA.method(); // Expect method not found.
                       ^^^^^^" in self::classA{<unresolved>}.method();
-static final field dynamic field2 = self::Extension|method<self::A*>(self::classA);
-static final field dynamic field3 = self::Extension|method<self::A*>(self::classA);
-static final field dynamic field4 = self::Extension|method<self::B*>(self::classA as{TypeError} self::Class<self::B*>*);
-static final field dynamic field5 = self::Extension|genericMethod<self::A*, self::A*>(self::classA, self::a);
-static final field dynamic field6 = self::Extension|genericMethod<self::A*, self::A*>(self::classA, self::a);
-static final field dynamic field7 = self::Extension|genericMethod<self::A*, self::B*>(self::classA, self::a as{TypeError} self::B*);
-static final field dynamic field8 = self::Extension|genericMethod<self::A*, self::A*>(self::classA, self::a);
-static final field dynamic field9 = self::Extension|genericMethod<self::A*, self::A*>(self::classA, self::a);
-static final field dynamic field10 = self::Extension|genericMethod<self::A*, self::B*>(self::classA, self::a as{TypeError} self::B*);
-static final field dynamic field11 = self::Extension|genericMethod<self::B*, self::A*>(self::classA as{TypeError} self::Class<self::B*>*, self::a);
-static final field dynamic field12 = self::Extension|genericMethod<self::B*, self::A*>(self::classA as{TypeError} self::Class<self::B*>*, self::a);
-static final field dynamic field13 = self::Extension|genericMethod<self::B*, self::B*>(self::classA as{TypeError} self::Class<self::B*>*, self::a as{TypeError} self::B*);
-static final field self::Class<self::B*>* classB = new self::Class::•<self::B*>();
-static final field dynamic field14 = self::Extension|method<self::B*>(self::classB);
-static final field dynamic field15 = self::Extension|method<self::B*>(self::classB);
-static final field dynamic field16 = self::Extension|method<self::A*>(self::classB);
-static final field dynamic field17 = self::Extension|method<self::B*>(self::classB);
-static final field dynamic field18 = self::Extension|genericMethod<self::B*, self::A*>(self::classB, self::a);
-static final field dynamic field19 = self::Extension|genericMethod<self::B*, self::A*>(self::classB, self::a);
-static final field dynamic field20 = self::Extension|genericMethod<self::B*, self::B*>(self::classB, self::a as{TypeError} self::B*);
-static final field dynamic field21 = self::Extension|genericMethod<self::B*, self::A*>(self::classB, self::a);
-static final field dynamic field22 = self::Extension|genericMethod<self::B*, self::A*>(self::classB, self::a);
-static final field dynamic field23 = self::Extension|genericMethod<self::B*, self::B*>(self::classB, self::a as{TypeError} self::B*);
-static final field dynamic field24 = self::Extension|genericMethod<self::A*, self::A*>(self::classB, self::a);
-static final field dynamic field25 = self::Extension|genericMethod<self::A*, self::A*>(self::classB, self::a);
-static final field dynamic field26 = self::Extension|genericMethod<self::A*, self::B*>(self::classB, self::a as{TypeError} self::B*);
-static final field dynamic field27 = self::Extension|genericMethod<self::B*, self::A*>(self::classB, self::a);
-static final field dynamic field28 = self::Extension|genericMethod<self::B*, self::A*>(self::classB, self::a);
-static final field dynamic field29 = self::Extension|genericMethod<self::B*, self::B*>(self::classB, self::a as{TypeError} self::B*);
-static method Extension|method<T extends self::B*>(lowered final self::Class<self::Extension|method::T*>* #this) → dynamic {}
-static method Extension|get#method<T extends self::B*>(lowered final self::Class<self::Extension|get#method::T*>* #this) → () →* dynamic
-  return () → dynamic => self::Extension|method<self::Extension|get#method::T*>(#this);
-static method Extension|genericMethod<T extends self::B*, S extends self::B*>(lowered final self::Class<self::Extension|genericMethod::T*>* #this, self::Extension|genericMethod::S* s) → dynamic {}
-static method Extension|get#genericMethod<T extends self::B*>(lowered final self::Class<self::Extension|get#genericMethod::T*>* #this) → <S extends self::B*>(S*) →* dynamic
-  return <S extends self::B*>(S* s) → dynamic => self::Extension|genericMethod<self::Extension|get#genericMethod::T*, S*>(#this, s);
+static final field dynamic field2 = self::Extension|method<self::A>(self::classA);
+static final field dynamic field3 = self::Extension|method<self::A>(self::classA);
+static final field dynamic field4 = self::Extension|method<self::B>(invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:64:29: Error: The argument type 'Class<A>' can't be assigned to the parameter type 'Class<B>'.
+ - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+final field4 = Extension<B>(classA).method();
+                            ^" in self::classA as{TypeError,ForNonNullableByDefault} self::Class<self::B>);
+static final field dynamic field5 = self::Extension|genericMethod<self::A, self::A>(self::classA, self::a);
+static final field dynamic field6 = self::Extension|genericMethod<self::A, self::A>(self::classA, self::a);
+static final field dynamic field7 = self::Extension|genericMethod<self::A, self::B>(self::classA, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:67:51: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+final field7 = Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
+                                                  ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static final field dynamic field8 = self::Extension|genericMethod<self::A, self::A>(self::classA, self::a);
+static final field dynamic field9 = self::Extension|genericMethod<self::A, self::A>(self::classA, self::a);
+static final field dynamic field10 = self::Extension|genericMethod<self::A, self::B>(self::classA, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:72:43: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+    Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
+                                          ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static final field dynamic field11 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field12 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field13 = self::Extension|genericMethod<self::B, self::B>(self::classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:77:55: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+final field13 = Extension<B>(classB).genericMethod<B>(a);
+                                                      ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static final field dynamic field14 = self::Extension|method<self::B>(self::classB);
+static final field dynamic field15 = self::Extension|method<self::B>(self::classB);
+static final field dynamic field16 = self::Extension|method<self::A>(self::classB);
+static final field dynamic field17 = self::Extension|method<self::B>(self::classB);
+static final field dynamic field18 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field19 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field20 = self::Extension|genericMethod<self::B, self::B>(self::classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:86:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+final field20 = classB.genericMethod<B>(a);
+                                        ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static final field dynamic field21 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field22 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field23 = self::Extension|genericMethod<self::B, self::B>(self::classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:90:52: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+final field23 = Extension(classB).genericMethod<B>(a);
+                                                   ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static final field dynamic field24 = self::Extension|genericMethod<self::A, self::A>(self::classB, self::a);
+static final field dynamic field25 = self::Extension|genericMethod<self::A, self::A>(self::classB, self::a);
+static final field dynamic field26 = self::Extension|genericMethod<self::A, self::B>(self::classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:96:43: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+    Extension<A>(classB).genericMethod<B>(a); // Expect bounds mismatch.
+                                          ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static final field dynamic field27 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field28 = self::Extension|genericMethod<self::B, self::A>(self::classB, self::a);
+static final field dynamic field29 = self::Extension|genericMethod<self::B, self::B>(self::classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:101:55: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+final field29 = Extension<B>(classB).genericMethod<B>(a);
+                                                      ^" in self::a as{TypeError,ForNonNullableByDefault} self::B);
+static method Extension|method<T extends self::B>(lowered final self::Class<self::Extension|method::T> #this) → dynamic {}
+static method Extension|get#method<T extends self::B>(lowered final self::Class<self::Extension|get#method::T> #this) → () → dynamic
+  return () → dynamic => self::Extension|method<self::Extension|get#method::T>(#this);
+static method Extension|genericMethod<T extends self::B, S extends self::B>(lowered final self::Class<self::Extension|genericMethod::T> #this, self::Extension|genericMethod::S s) → dynamic {}
+static method Extension|get#genericMethod<T extends self::B>(lowered final self::Class<self::Extension|get#genericMethod::T> #this) → <S extends self::B>(S) → dynamic
+  return <S extends self::B>(S s) → dynamic => self::Extension|genericMethod<self::Extension|get#genericMethod::T, S>(#this, s);
 static method main() → dynamic {}
-static method test() → dynamic {
-  self::A* a;
-  self::Class<self::A*>* classA = new self::Class::•<self::A*>();
+static method test(self::A a) → dynamic {
+  self::Class<self::A> classA = new self::Class::•<self::A>();
+  self::Class<self::B> classB = new self::Class::•<self::B>();
   invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:24:10: Error: The method 'method' isn't defined for the class 'Class<A>'.
  - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 Try correcting the name to the name of an existing method, or defining a method named 'method'.
   classA.method(); // Expect method not found.
          ^^^^^^" in classA{<unresolved>}.method();
-  self::Extension|method<self::A*>(classA);
-  self::Extension|method<self::A*>(classA);
-  self::Extension|method<self::B*>(classA as{TypeError} self::Class<self::B*>*);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::B*>(classA, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::B*>(classA, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::B*, self::A*>(classA as{TypeError} self::Class<self::B*>*, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classA as{TypeError} self::Class<self::B*>*, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classA as{TypeError} self::Class<self::B*>*, a as{TypeError} self::B*);
-  self::Class<self::B*>* classB = new self::Class::•<self::B*>();
-  self::Extension|method<self::B*>(classB);
-  self::Extension|method<self::B*>(classB);
-  self::Extension|method<self::A*>(classB);
-  self::Extension|method<self::B*>(classB);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classB, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classB, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::A*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::A*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::A*, self::B*>(classB, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classB, a as{TypeError} self::B*);
+  self::Extension|method<self::A>(classA);
+  self::Extension|method<self::A>(classA);
+  self::Extension|method<self::B>(classB);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::B>(classA, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:30:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
+                                     ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::B>(classA, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:33:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:36:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<B>(classB).genericMethod<B>(a);
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|method<self::B>(classB);
+  self::Extension|method<self::B>(classB);
+  self::Extension|method<self::A>(classB);
+  self::Extension|method<self::B>(classB);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:45:27: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  classB.genericMethod<B>(a);
+                          ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:48:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension(classB).genericMethod<B>(a);
+                                     ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::A, self::A>(classB, a);
+  self::Extension|genericMethod<self::A, self::A>(classB, a);
+  self::Extension|genericMethod<self::A, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:51:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<A>(classB).genericMethod<B>(a); // Expect bounds mismatch.
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds.dart:54:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<B>(classB).genericMethod<B>(a);
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
 }
-static method /* from org-dartlang-testcase:///check_bounds_lib.dart */ testInPart() → dynamic {
-  self::A* a;
-  self::Class<self::A*>* classA = new self::Class::•<self::A*>();
+static method /* from org-dartlang-testcase:///check_bounds_lib.dart */ testInPart(self::A a) → dynamic {
+  self::Class<self::A> classA = new self::Class::•<self::A>();
+  self::Class<self::B> classB = new self::Class::•<self::B>();
   invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:11:10: Error: The method 'method' isn't defined for the class 'Class<A>'.
  - 'Class' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
  - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
 Try correcting the name to the name of an existing method, or defining a method named 'method'.
   classA.method();
          ^^^^^^" in classA{<unresolved>}.method();
-  self::Extension|method<self::A*>(classA);
-  self::Extension|method<self::A*>(classA);
-  self::Extension|method<self::B*>(classA as{TypeError} self::Class<self::B*>*);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::B*>(classA, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::A*>(classA, a);
-  self::Extension|genericMethod<self::A*, self::B*>(classA, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::B*, self::A*>(classA as{TypeError} self::Class<self::B*>*, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classA as{TypeError} self::Class<self::B*>*, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classA as{TypeError} self::Class<self::B*>*, a as{TypeError} self::B*);
-  self::Class<self::B*>* classB = new self::Class::•<self::B*>();
-  self::Extension|method<self::B*>(classB);
-  self::Extension|method<self::B*>(classB);
-  self::Extension|method<self::A*>(classB);
-  self::Extension|method<self::B*>(classB);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classB, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classB, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::A*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::A*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::A*, self::B*>(classB, a as{TypeError} self::B*);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::A*>(classB, a);
-  self::Extension|genericMethod<self::B*, self::B*>(classB, a as{TypeError} self::B*);
+  self::Extension|method<self::A>(classA);
+  self::Extension|method<self::A>(classA);
+  self::Extension|method<self::B>(classB);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::B>(classA, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:17:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
+                                     ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::A>(classA, a);
+  self::Extension|genericMethod<self::A, self::B>(classA, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:20:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:23:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<B>(classB).genericMethod<B>(a);
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|method<self::B>(classB);
+  self::Extension|method<self::B>(classB);
+  self::Extension|method<self::A>(classB);
+  self::Extension|method<self::B>(classB);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:32:27: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  classB.genericMethod<B>(a);
+                          ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:35:38: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension(classB).genericMethod<B>(a);
+                                     ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::A, self::A>(classB, a);
+  self::Extension|genericMethod<self::A, self::A>(classB, a);
+  self::Extension|genericMethod<self::A, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:38:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<A>(classB).genericMethod<B>(a); // Expect bounds mismatch.
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::A>(classB, a);
+  self::Extension|genericMethod<self::B, self::B>(classB, invalid-expression "pkg/front_end/testcases/extensions/check_bounds_lib.dart:41:41: Error: The argument type 'A' can't be assigned to the parameter type 'B'.
+ - 'A' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+ - 'B' is from 'pkg/front_end/testcases/extensions/check_bounds.dart'.
+  Extension<B>(classB).genericMethod<B>(a);
+                                        ^" in a as{TypeError,ForNonNullableByDefault} self::B);
 }

pkg/front_end/testcases/extensions/check_bounds_lib.dart

@@ -1,28 +1,27 @@
 // Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// @dart=2.9
+
 part of 'check_bounds.dart';
 
-testInPart() {
-  A a;
-
+testInPart(A a) {
   Class<A> classA = new Class<A>();
+  Class<B> classB = new Class<B>();
+
   classA.method();
   Extension(classA).method(); // Expect bounds mismatch.
   Extension<A>(classA).method(); // Expect bounds mismatch.
-  Extension<B>(classA).method();
+  Extension<B>(classB).method();
   Extension(classA).genericMethod(a); // Expect bounds mismatch.
   Extension(classA).genericMethod<A>(a); // Expect bounds mismatch.
   Extension(classA).genericMethod<B>(a); // Expect bounds mismatch.
   Extension<A>(classA).genericMethod(a); // Expect bounds mismatch.
   Extension<A>(classA).genericMethod<A>(a); // Expect bounds mismatch.
   Extension<A>(classA).genericMethod<B>(a); // Expect bounds mismatch.
-  Extension<B>(classA).genericMethod(a); // Expect bounds mismatch.
-  Extension<B>(classA).genericMethod<A>(a); // Expect bounds mismatch.
-  Extension<B>(classA).genericMethod<B>(a);
+  Extension<B>(classB).genericMethod(a); // Expect bounds mismatch.
+  Extension<B>(classB).genericMethod<A>(a); // Expect bounds mismatch.
+  Extension<B>(classB).genericMethod<B>(a);
 
-  Class<B> classB = new Class<B>();
   classB.method();
   Extension(classB).method();
   Extension<A>(classB).method(); // Expect bounds mismatch.

pkg/front_end/testcases/extensions/compounds.dart

@@ -1,7 +1,7 @@
 // Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// @dart=2.9
+
 class Number {
   final int value;
 
@@ -408,7 +408,7 @@ testExplicitIntProperties() {
   expect(n0, IntClassExtension(v).property);
 }
 
-testExplicitNullAwareProperties(Class v) {
+testExplicitNullAwareProperties(Class? v) {
   Number n0 = new Number(0);
   Number n1 = new Number(1);
   Number n2 = new Number(2);
@@ -446,7 +446,7 @@ testExplicitNullAwareProperties(Class v) {
   expect(n0, ClassExtension(v)?.property, v == null);
 }
 
-testExplicitNullAwareIntProperties(IntClass v) {
+testExplicitNullAwareIntProperties(IntClass? v) {
   int n0 = 0;
   int n1 = 1;
   int n2 = 2;

pkg/front_end/testcases/extensions/compounds.dart.textual_outline.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 class Number {
   final int value;
   Number(this.value);
@@ -40,6 +39,6 @@ testProperties() {}
 testIntProperties() {}
 testExplicitProperties() {}
 testExplicitIntProperties() {}
-testExplicitNullAwareProperties(Class v) {}
-testExplicitNullAwareIntProperties(IntClass v) {}
+testExplicitNullAwareProperties(Class? v) {}
+testExplicitNullAwareIntProperties(IntClass? v) {}
 expect(expected, actual, [expectNull = false]) {}

pkg/front_end/testcases/extensions/compounds.dart.textual_outline_modelled.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 class Class {
   Class(this.field);
   Number field;
@@ -38,8 +37,8 @@ extension NumberExtension on Number {
 
 main() {}
 testExplicitIntProperties() {}
-testExplicitNullAwareIntProperties(IntClass v) {}
-testExplicitNullAwareProperties(Class v) {}
+testExplicitNullAwareIntProperties(IntClass? v) {}
+testExplicitNullAwareProperties(Class? v) {}
 testExplicitProperties() {}
 testIntProperties() {}
 testLocals() {}

pkg/front_end/testcases/extensions/compounds.dart.weak.expect

@@ -1,117 +1,90 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 class Number extends core::Object {
-  final field core::int* value;
-  constructor •(core::int* value) → self::Number*
+  final field core::int value;
+  constructor •(core::int value) → self::Number
     : self::Number::value = value, super core::Object::•()
     ;
-  get hashCode() → core::int*
-    return this.{self::Number::value}{core::int*}.{core::num::hashCode}{core::int*};
-  operator ==(core::Object* other) → core::bool*
-    return other is self::Number* && this.{self::Number::value}{core::int*} =={core::num::==}{(core::Object*) →* core::bool*} other{self::Number*}.{self::Number::value}{core::int*};
-  method toString() → core::String*
-    return "Number(${this.{self::Number::value}{core::int*}})";
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
+  get hashCode() → core::int
+    return this.{self::Number::value}{core::int}.{core::num::hashCode}{core::int};
+  operator ==(core::Object other) → core::bool
+    return other is{ForNonNullableByDefault} self::Number && this.{self::Number::value}{core::int} =={core::num::==}{(core::Object) → core::bool} other{self::Number}.{self::Number::value}{core::int};
+  method toString() → core::String
+    return "Number(${this.{self::Number::value}{core::int}})";
 }
 class Class extends core::Object {
-  field self::Number* field;
-  constructor •(self::Number* field) → self::Class*
+  field self::Number field;
+  constructor •(self::Number field) → self::Class
     : self::Class::field = field, super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
 class IntClass extends core::Object {
-  field core::int* field;
-  constructor •(core::int* field) → self::IntClass*
+  field core::int field;
+  constructor •(core::int field) → self::IntClass
     : self::IntClass::field = field, super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension NumberExtension on self::Number* {
+extension NumberExtension on self::Number {
   operator + = self::NumberExtension|+;
   operator - = self::NumberExtension|-;
 }
-extension ClassExtension on self::Class* {
+extension ClassExtension on self::Class {
   get property = self::ClassExtension|get#property;
   method testImplicitProperties = self::ClassExtension|testImplicitProperties;
   tearoff testImplicitProperties = self::ClassExtension|get#testImplicitProperties;
   set property = self::ClassExtension|set#property;
 }
-extension IntClassExtension on self::IntClass* {
+extension IntClassExtension on self::IntClass {
   get property = self::IntClassExtension|get#property;
   method testImplicitProperties = self::IntClassExtension|testImplicitProperties;
   tearoff testImplicitProperties = self::IntClassExtension|get#testImplicitProperties;
   set property = self::IntClassExtension|set#property;
 }
-static method NumberExtension|+(lowered final self::Number* #this, core::Object* other) → self::Number* {
-  if(other is core::int*) {
-    return new self::Number::•(#this.{self::Number::value}{core::int*}.{core::num::+}(other{core::int*}){(core::num*) →* core::int*});
+static method NumberExtension|+(lowered final self::Number #this, core::Object other) → self::Number {
+  if(other is{ForNonNullableByDefault} core::int) {
+    return new self::Number::•(#this.{self::Number::value}{core::int}.{core::num::+}(other{core::int}){(core::num) → core::int});
   }
   else
-    if(other is self::Number*) {
-      return new self::Number::•(#this.{self::Number::value}{core::int*}.{core::num::+}(other{self::Number*}.{self::Number::value}{core::int*}){(core::num*) →* core::int*});
+    if(other is{ForNonNullableByDefault} self::Number) {
+      return new self::Number::•(#this.{self::Number::value}{core::int}.{core::num::+}(other{self::Number}.{self::Number::value}{core::int}){(core::num) → core::int});
     }
     else {
       throw new core::ArgumentError::•("${other}");
     }
 }
-static method NumberExtension|-(lowered final self::Number* #this, core::Object* other) → self::Number* {
-  if(other is core::int*) {
-    return new self::Number::•(#this.{self::Number::value}{core::int*}.{core::num::-}(other{core::int*}){(core::num*) →* core::int*});
+static method NumberExtension|-(lowered final self::Number #this, core::Object other) → self::Number {
+  if(other is{ForNonNullableByDefault} core::int) {
+    return new self::Number::•(#this.{self::Number::value}{core::int}.{core::num::-}(other{core::int}){(core::num) → core::int});
   }
   else
-    if(other is self::Number*) {
-      return new self::Number::•(#this.{self::Number::value}{core::int*}.{core::num::-}(other{self::Number*}.{self::Number::value}{core::int*}){(core::num*) →* core::int*});
+    if(other is{ForNonNullableByDefault} self::Number) {
+      return new self::Number::•(#this.{self::Number::value}{core::int}.{core::num::-}(other{self::Number}.{self::Number::value}{core::int}){(core::num) → core::int});
     }
     else {
       throw new core::ArgumentError::•("${other}");
     }
 }
-static method ClassExtension|get#property(lowered final self::Class* #this) → self::Number*
-  return #this.{self::Class::field}{self::Number*};
-static method ClassExtension|set#property(lowered final self::Class* #this, self::Number* value) → void {
+static method ClassExtension|get#property(lowered final self::Class #this) → self::Number
+  return #this.{self::Class::field}{self::Number};
+static method ClassExtension|set#property(lowered final self::Class #this, self::Number value) → void {
   #this.{self::Class::field} = value;
 }
-static method ClassExtension|testImplicitProperties(lowered final self::Class* #this) → dynamic {
-  self::Number* n0 = new self::Number::•(0);
-  self::Number* n1 = new self::Number::•(1);
-  self::Number* n2 = new self::Number::•(2);
+static method ClassExtension|testImplicitProperties(lowered final self::Class #this) → dynamic {
+  self::Number n0 = new self::Number::•(0);
+  self::Number n1 = new self::Number::•(1);
+  self::Number n2 = new self::Number::•(2);
   self::expect(n0, self::ClassExtension|get#property(#this));
-  self::expect(n1, let final self::Number* #t1 = self::NumberExtension|+(self::ClassExtension|get#property(#this), n1) in let final void #t2 = self::ClassExtension|set#property(#this, #t1) in #t1);
-  self::expect(n2, let final self::Number* #t3 = self::NumberExtension|+(self::ClassExtension|get#property(#this), n1) in let final void #t4 = self::ClassExtension|set#property(#this, #t3) in #t3);
-  self::expect(n0, let final self::Number* #t5 = self::NumberExtension|-(self::ClassExtension|get#property(#this), n2) in let final void #t6 = self::ClassExtension|set#property(#this, #t5) in #t5);
-  self::expect(n1, let final self::Number* #t7 = self::NumberExtension|+(self::ClassExtension|get#property(#this), n1) in let final void #t8 = self::ClassExtension|set#property(#this, #t7) in #t7);
-  self::expect(n0, let final self::Number* #t9 = self::NumberExtension|-(self::ClassExtension|get#property(#this), n1) in let final void #t10 = self::ClassExtension|set#property(#this, #t9) in #t9);
-  self::expect(n1, let final self::Number* #t11 = self::NumberExtension|+(self::ClassExtension|get#property(#this), 1) in let final void #t12 = self::ClassExtension|set#property(#this, #t11) in #t11);
-  self::expect(n0, let final self::Number* #t13 = self::NumberExtension|-(self::ClassExtension|get#property(#this), 1) in let final void #t14 = self::ClassExtension|set#property(#this, #t13) in #t13);
-  self::expect(n0, let final self::Number* #t15 = self::ClassExtension|get#property(#this) in let final self::Number* #t16 = self::ClassExtension|set#property(#this, self::NumberExtension|+(#t15, 1)) in #t15);
-  self::expect(n1, let final self::Number* #t17 = self::ClassExtension|get#property(#this) in let final self::Number* #t18 = self::ClassExtension|set#property(#this, self::NumberExtension|-(#t17, 1)) in #t17);
+  self::expect(n1, let final self::Number #t1 = self::NumberExtension|+(self::ClassExtension|get#property(#this), n1) in let final void #t2 = self::ClassExtension|set#property(#this, #t1) in #t1);
+  self::expect(n2, let final self::Number #t3 = self::NumberExtension|+(self::ClassExtension|get#property(#this), n1) in let final void #t4 = self::ClassExtension|set#property(#this, #t3) in #t3);
+  self::expect(n0, let final self::Number #t5 = self::NumberExtension|-(self::ClassExtension|get#property(#this), n2) in let final void #t6 = self::ClassExtension|set#property(#this, #t5) in #t5);
+  self::expect(n1, let final self::Number #t7 = self::NumberExtension|+(self::ClassExtension|get#property(#this), n1) in let final void #t8 = self::ClassExtension|set#property(#this, #t7) in #t7);
+  self::expect(n0, let final self::Number #t9 = self::NumberExtension|-(self::ClassExtension|get#property(#this), n1) in let final void #t10 = self::ClassExtension|set#property(#this, #t9) in #t9);
+  self::expect(n1, let final self::Number #t11 = self::NumberExtension|+(self::ClassExtension|get#property(#this), 1) in let final void #t12 = self::ClassExtension|set#property(#this, #t11) in #t11);
+  self::expect(n0, let final self::Number #t13 = self::NumberExtension|-(self::ClassExtension|get#property(#this), 1) in let final void #t14 = self::ClassExtension|set#property(#this, #t13) in #t13);
+  self::expect(n0, let final self::Number #t15 = self::ClassExtension|get#property(#this) in let final self::Number #t16 = self::ClassExtension|set#property(#this, self::NumberExtension|+(#t15, 1)) in #t15);
+  self::expect(n1, let final self::Number #t17 = self::ClassExtension|get#property(#this) in let final self::Number #t18 = self::ClassExtension|set#property(#this, self::NumberExtension|-(#t17, 1)) in #t17);
   self::expect(n0, self::ClassExtension|get#property(#this));
   self::expect(n0, self::ClassExtension|get#property(#this));
   self::ClassExtension|set#property(#this, self::NumberExtension|+(self::ClassExtension|get#property(#this), n1));
@@ -124,58 +97,58 @@ static method ClassExtension|testImplicitProperties(lowered final self::Class* #
   self::expect(n1, self::ClassExtension|get#property(#this));
   self::ClassExtension|set#property(#this, self::NumberExtension|-(self::ClassExtension|get#property(#this), n1));
   self::expect(n0, self::ClassExtension|get#property(#this));
-  let final self::Number* #t19 = self::NumberExtension|+(self::ClassExtension|get#property(#this), 1) in let final void #t20 = self::ClassExtension|set#property(#this, #t19) in #t19;
+  let final self::Number #t19 = self::NumberExtension|+(self::ClassExtension|get#property(#this), 1) in let final void #t20 = self::ClassExtension|set#property(#this, #t19) in #t19;
   self::expect(n1, self::ClassExtension|get#property(#this));
-  let final self::Number* #t21 = self::NumberExtension|-(self::ClassExtension|get#property(#this), 1) in let final void #t22 = self::ClassExtension|set#property(#this, #t21) in #t21;
+  let final self::Number #t21 = self::NumberExtension|-(self::ClassExtension|get#property(#this), 1) in let final void #t22 = self::ClassExtension|set#property(#this, #t21) in #t21;
   self::expect(n0, self::ClassExtension|get#property(#this));
   self::ClassExtension|set#property(#this, self::NumberExtension|+(self::ClassExtension|get#property(#this), 1));
   self::expect(n1, self::ClassExtension|get#property(#this));
   self::ClassExtension|set#property(#this, self::NumberExtension|-(self::ClassExtension|get#property(#this), 1));
   self::expect(n0, self::ClassExtension|get#property(#this));
 }
-static method ClassExtension|get#testImplicitProperties(lowered final self::Class* #this) → () →* dynamic
+static method ClassExtension|get#testImplicitProperties(lowered final self::Class #this) → () → dynamic
   return () → dynamic => self::ClassExtension|testImplicitProperties(#this);
-static method IntClassExtension|get#property(lowered final self::IntClass* #this) → core::int*
-  return #this.{self::IntClass::field}{core::int*};
-static method IntClassExtension|set#property(lowered final self::IntClass* #this, core::int* value) → void {
+static method IntClassExtension|get#property(lowered final self::IntClass #this) → core::int
+  return #this.{self::IntClass::field}{core::int};
+static method IntClassExtension|set#property(lowered final self::IntClass #this, core::int value) → void {
   #this.{self::IntClass::field} = value;
 }
-static method IntClassExtension|testImplicitProperties(lowered final self::IntClass* #this) → dynamic {
-  core::int* n0 = 0;
-  core::int* n1 = 1;
-  core::int* n2 = 2;
+static method IntClassExtension|testImplicitProperties(lowered final self::IntClass #this) → dynamic {
+  core::int n0 = 0;
+  core::int n1 = 1;
+  core::int n2 = 2;
   self::expect(n0, self::IntClassExtension|get#property(#this));
-  self::expect(n1, let final core::int* #t23 = self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t24 = self::IntClassExtension|set#property(#this, #t23) in #t23);
-  self::expect(n2, let final core::int* #t25 = self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t26 = self::IntClassExtension|set#property(#this, #t25) in #t25);
-  self::expect(n0, let final core::int* #t27 = self::IntClassExtension|get#property(#this).{core::num::-}(n2){(core::num*) →* core::int*} in let final void #t28 = self::IntClassExtension|set#property(#this, #t27) in #t27);
-  self::expect(n1, let final core::int* #t29 = self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t30 = self::IntClassExtension|set#property(#this, #t29) in #t29);
-  self::expect(n0, let final core::int* #t31 = self::IntClassExtension|get#property(#this).{core::num::-}(n1){(core::num*) →* core::int*} in let final void #t32 = self::IntClassExtension|set#property(#this, #t31) in #t31);
-  self::expect(n1, let final core::int* #t33 = self::IntClassExtension|get#property(#this).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t34 = self::IntClassExtension|set#property(#this, #t33) in #t33);
-  self::expect(n0, let final core::int* #t35 = self::IntClassExtension|get#property(#this).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t36 = self::IntClassExtension|set#property(#this, #t35) in #t35);
-  self::expect(n0, let final core::int* #t37 = self::IntClassExtension|get#property(#this) in let final core::int* #t38 = self::IntClassExtension|set#property(#this, #t37.{core::num::+}(1){(core::num*) →* core::int*}) in #t37);
-  self::expect(n1, let final core::int* #t39 = self::IntClassExtension|get#property(#this) in let final core::int* #t40 = self::IntClassExtension|set#property(#this, #t39.{core::num::-}(1){(core::num*) →* core::int*}) in #t39);
+  self::expect(n1, let final core::int #t23 = self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num) → core::int} in let final void #t24 = self::IntClassExtension|set#property(#this, #t23) in #t23);
+  self::expect(n2, let final core::int #t25 = self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num) → core::int} in let final void #t26 = self::IntClassExtension|set#property(#this, #t25) in #t25);
+  self::expect(n0, let final core::int #t27 = self::IntClassExtension|get#property(#this).{core::num::-}(n2){(core::num) → core::int} in let final void #t28 = self::IntClassExtension|set#property(#this, #t27) in #t27);
+  self::expect(n1, let final core::int #t29 = self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num) → core::int} in let final void #t30 = self::IntClassExtension|set#property(#this, #t29) in #t29);
+  self::expect(n0, let final core::int #t31 = self::IntClassExtension|get#property(#this).{core::num::-}(n1){(core::num) → core::int} in let final void #t32 = self::IntClassExtension|set#property(#this, #t31) in #t31);
+  self::expect(n1, let final core::int #t33 = self::IntClassExtension|get#property(#this).{core::num::+}(1){(core::num) → core::int} in let final void #t34 = self::IntClassExtension|set#property(#this, #t33) in #t33);
+  self::expect(n0, let final core::int #t35 = self::IntClassExtension|get#property(#this).{core::num::-}(1){(core::num) → core::int} in let final void #t36 = self::IntClassExtension|set#property(#this, #t35) in #t35);
+  self::expect(n0, let final core::int #t37 = self::IntClassExtension|get#property(#this) in let final core::int #t38 = self::IntClassExtension|set#property(#this, #t37.{core::num::+}(1){(core::num) → core::int}) in #t37);
+  self::expect(n1, let final core::int #t39 = self::IntClassExtension|get#property(#this) in let final core::int #t40 = self::IntClassExtension|set#property(#this, #t39.{core::num::-}(1){(core::num) → core::int}) in #t39);
   self::expect(n0, self::IntClassExtension|get#property(#this));
   self::expect(n0, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n2, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::-}(n2){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::-}(n2){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::-}(n1){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::-}(n1){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(#this));
-  let final core::int* #t41 = self::IntClassExtension|get#property(#this).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t42 = self::IntClassExtension|set#property(#this, #t41) in #t41;
+  let final core::int #t41 = self::IntClassExtension|get#property(#this).{core::num::+}(1){(core::num) → core::int} in let final void #t42 = self::IntClassExtension|set#property(#this, #t41) in #t41;
   self::expect(n1, self::IntClassExtension|get#property(#this));
-  let final core::int* #t43 = self::IntClassExtension|get#property(#this).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t44 = self::IntClassExtension|set#property(#this, #t43) in #t43;
+  let final core::int #t43 = self::IntClassExtension|get#property(#this).{core::num::-}(1){(core::num) → core::int} in let final void #t44 = self::IntClassExtension|set#property(#this, #t43) in #t43;
   self::expect(n0, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(1){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::-}(1){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::-}(1){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(#this));
 }
-static method IntClassExtension|get#testImplicitProperties(lowered final self::IntClass* #this) → () →* dynamic
+static method IntClassExtension|get#testImplicitProperties(lowered final self::IntClass #this) → () → dynamic
   return () → dynamic => self::IntClassExtension|testImplicitProperties(#this);
 static method main() → dynamic {
   self::testLocals();
@@ -191,10 +164,10 @@ static method main() → dynamic {
   self::IntClassExtension|testImplicitProperties(new self::IntClass::•(0));
 }
 static method testLocals() → dynamic {
-  self::Number* n0 = new self::Number::•(0);
-  self::Number* n1 = new self::Number::•(1);
-  self::Number* n2 = new self::Number::•(2);
-  self::Number* v = n0;
+  self::Number n0 = new self::Number::•(0);
+  self::Number n1 = new self::Number::•(1);
+  self::Number n2 = new self::Number::•(2);
+  self::Number v = n0;
   self::expect(n0, v);
   self::expect(n1, v = self::NumberExtension|+(v, n1));
   self::expect(n2, v = self::NumberExtension|+(v, n1));
@@ -203,8 +176,8 @@ static method testLocals() → dynamic {
   self::expect(n0, v = self::NumberExtension|-(v, n1));
   self::expect(n1, v = self::NumberExtension|+(v, 1));
   self::expect(n0, v = self::NumberExtension|-(v, 1));
-  self::expect(n0, let final self::Number* #t45 = v in let final self::Number* #t46 = v = self::NumberExtension|+(#t45, 1) in #t45);
-  self::expect(n1, let final self::Number* #t47 = v in let final self::Number* #t48 = v = self::NumberExtension|-(#t47, 1) in #t47);
+  self::expect(n0, let final self::Number #t45 = v in let final self::Number #t46 = v = self::NumberExtension|+(#t45, 1) in #t45);
+  self::expect(n1, let final self::Number #t47 = v in let final self::Number #t48 = v = self::NumberExtension|-(#t47, 1) in #t47);
   self::expect(n0, v);
   self::expect(n0, v);
   v = self::NumberExtension|+(v, n1);
@@ -227,284 +200,284 @@ static method testLocals() → dynamic {
   self::expect(n0, v);
 }
 static method testProperties() → dynamic {
-  self::Number* n0 = new self::Number::•(0);
-  self::Number* n1 = new self::Number::•(1);
-  self::Number* n2 = new self::Number::•(2);
-  self::Class* v = new self::Class::•(n0);
-  self::expect(n0, v.{self::Class::field}{self::Number*});
-  self::expect(n1, let final self::Class* #t49 = v in #t49.{self::Class::field} = self::NumberExtension|+(#t49.{self::Class::field}{self::Number*}, n1));
-  self::expect(n2, let final self::Class* #t50 = v in #t50.{self::Class::field} = self::NumberExtension|+(#t50.{self::Class::field}{self::Number*}, n1));
-  self::expect(n0, let final self::Class* #t51 = v in #t51.{self::Class::field} = self::NumberExtension|-(#t51.{self::Class::field}{self::Number*}, n2));
-  self::expect(n1, let final self::Class* #t52 = v in #t52.{self::Class::field} = self::NumberExtension|+(#t52.{self::Class::field}{self::Number*}, n1));
-  self::expect(n0, let final self::Class* #t53 = v in #t53.{self::Class::field} = self::NumberExtension|-(#t53.{self::Class::field}{self::Number*}, n1));
-  self::expect(n1, let final self::Class* #t54 = v in #t54.{self::Class::field} = self::NumberExtension|+(#t54.{self::Class::field}{self::Number*}, 1));
-  self::expect(n0, let final self::Class* #t55 = v in #t55.{self::Class::field} = self::NumberExtension|-(#t55.{self::Class::field}{self::Number*}, 1));
-  self::expect(n0, let final self::Class* #t56 = v in let final self::Number* #t57 = #t56.{self::Class::field}{self::Number*} in let final self::Number* #t58 = #t56.{self::Class::field} = self::NumberExtension|+(#t57, 1) in #t57);
-  self::expect(n1, let final self::Class* #t59 = v in let final self::Number* #t60 = #t59.{self::Class::field}{self::Number*} in let final self::Number* #t61 = #t59.{self::Class::field} = self::NumberExtension|-(#t60, 1) in #t60);
-  self::expect(n0, v.{self::Class::field}{self::Number*});
-  self::expect(n0, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t62 = v in #t62.{self::Class::field} = self::NumberExtension|+(#t62.{self::Class::field}{self::Number*}, n1);
-  self::expect(n1, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t63 = v in #t63.{self::Class::field} = self::NumberExtension|+(#t63.{self::Class::field}{self::Number*}, n1);
-  self::expect(n2, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t64 = v in #t64.{self::Class::field} = self::NumberExtension|-(#t64.{self::Class::field}{self::Number*}, n2);
-  self::expect(n0, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t65 = v in #t65.{self::Class::field} = self::NumberExtension|+(#t65.{self::Class::field}{self::Number*}, n1);
-  self::expect(n1, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t66 = v in #t66.{self::Class::field} = self::NumberExtension|-(#t66.{self::Class::field}{self::Number*}, n1);
-  self::expect(n0, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t67 = v in #t67.{self::Class::field} = self::NumberExtension|+(#t67.{self::Class::field}{self::Number*}, 1);
-  self::expect(n1, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t68 = v in #t68.{self::Class::field} = self::NumberExtension|-(#t68.{self::Class::field}{self::Number*}, 1);
-  self::expect(n0, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t69 = v in #t69.{self::Class::field} = self::NumberExtension|+(#t69.{self::Class::field}{self::Number*}, 1);
-  self::expect(n1, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t70 = v in #t70.{self::Class::field} = self::NumberExtension|-(#t70.{self::Class::field}{self::Number*}, 1);
-  self::expect(n0, v.{self::Class::field}{self::Number*});
+  self::Number n0 = new self::Number::•(0);
+  self::Number n1 = new self::Number::•(1);
+  self::Number n2 = new self::Number::•(2);
+  self::Class v = new self::Class::•(n0);
+  self::expect(n0, v.{self::Class::field}{self::Number});
+  self::expect(n1, let final self::Class #t49 = v in #t49.{self::Class::field} = self::NumberExtension|+(#t49.{self::Class::field}{self::Number}, n1));
+  self::expect(n2, let final self::Class #t50 = v in #t50.{self::Class::field} = self::NumberExtension|+(#t50.{self::Class::field}{self::Number}, n1));
+  self::expect(n0, let final self::Class #t51 = v in #t51.{self::Class::field} = self::NumberExtension|-(#t51.{self::Class::field}{self::Number}, n2));
+  self::expect(n1, let final self::Class #t52 = v in #t52.{self::Class::field} = self::NumberExtension|+(#t52.{self::Class::field}{self::Number}, n1));
+  self::expect(n0, let final self::Class #t53 = v in #t53.{self::Class::field} = self::NumberExtension|-(#t53.{self::Class::field}{self::Number}, n1));
+  self::expect(n1, let final self::Class #t54 = v in #t54.{self::Class::field} = self::NumberExtension|+(#t54.{self::Class::field}{self::Number}, 1));
+  self::expect(n0, let final self::Class #t55 = v in #t55.{self::Class::field} = self::NumberExtension|-(#t55.{self::Class::field}{self::Number}, 1));
+  self::expect(n0, let final self::Class #t56 = v in let final self::Number #t57 = #t56.{self::Class::field}{self::Number} in let final self::Number #t58 = #t56.{self::Class::field} = self::NumberExtension|+(#t57, 1) in #t57);
+  self::expect(n1, let final self::Class #t59 = v in let final self::Number #t60 = #t59.{self::Class::field}{self::Number} in let final self::Number #t61 = #t59.{self::Class::field} = self::NumberExtension|-(#t60, 1) in #t60);
+  self::expect(n0, v.{self::Class::field}{self::Number});
+  self::expect(n0, v.{self::Class::field}{self::Number});
+  let final self::Class #t62 = v in #t62.{self::Class::field} = self::NumberExtension|+(#t62.{self::Class::field}{self::Number}, n1);
+  self::expect(n1, v.{self::Class::field}{self::Number});
+  let final self::Class #t63 = v in #t63.{self::Class::field} = self::NumberExtension|+(#t63.{self::Class::field}{self::Number}, n1);
+  self::expect(n2, v.{self::Class::field}{self::Number});
+  let final self::Class #t64 = v in #t64.{self::Class::field} = self::NumberExtension|-(#t64.{self::Class::field}{self::Number}, n2);
+  self::expect(n0, v.{self::Class::field}{self::Number});
+  let final self::Class #t65 = v in #t65.{self::Class::field} = self::NumberExtension|+(#t65.{self::Class::field}{self::Number}, n1);
+  self::expect(n1, v.{self::Class::field}{self::Number});
+  let final self::Class #t66 = v in #t66.{self::Class::field} = self::NumberExtension|-(#t66.{self::Class::field}{self::Number}, n1);
+  self::expect(n0, v.{self::Class::field}{self::Number});
+  let final self::Class #t67 = v in #t67.{self::Class::field} = self::NumberExtension|+(#t67.{self::Class::field}{self::Number}, 1);
+  self::expect(n1, v.{self::Class::field}{self::Number});
+  let final self::Class #t68 = v in #t68.{self::Class::field} = self::NumberExtension|-(#t68.{self::Class::field}{self::Number}, 1);
+  self::expect(n0, v.{self::Class::field}{self::Number});
+  let final self::Class #t69 = v in #t69.{self::Class::field} = self::NumberExtension|+(#t69.{self::Class::field}{self::Number}, 1);
+  self::expect(n1, v.{self::Class::field}{self::Number});
+  let final self::Class #t70 = v in #t70.{self::Class::field} = self::NumberExtension|-(#t70.{self::Class::field}{self::Number}, 1);
+  self::expect(n0, v.{self::Class::field}{self::Number});
   self::expect(n0, self::ClassExtension|get#property(v));
-  self::expect(n1, let final self::Class* #t71 = v in let final self::Number* #t72 = self::NumberExtension|+(self::ClassExtension|get#property(#t71), n1) in let final void #t73 = self::ClassExtension|set#property(#t71, #t72) in #t72);
-  self::expect(n2, let final self::Class* #t74 = v in let final self::Number* #t75 = self::NumberExtension|+(self::ClassExtension|get#property(#t74), n1) in let final void #t76 = self::ClassExtension|set#property(#t74, #t75) in #t75);
-  self::expect(n0, let final self::Class* #t77 = v in let final self::Number* #t78 = self::NumberExtension|-(self::ClassExtension|get#property(#t77), n2) in let final void #t79 = self::ClassExtension|set#property(#t77, #t78) in #t78);
-  self::expect(n1, let final self::Class* #t80 = v in let final self::Number* #t81 = self::NumberExtension|+(self::ClassExtension|get#property(#t80), n1) in let final void #t82 = self::ClassExtension|set#property(#t80, #t81) in #t81);
-  self::expect(n0, let final self::Class* #t83 = v in let final self::Number* #t84 = self::NumberExtension|-(self::ClassExtension|get#property(#t83), n1) in let final void #t85 = self::ClassExtension|set#property(#t83, #t84) in #t84);
-  self::expect(n1, let final self::Class* #t86 = v in let final self::Number* #t87 = self::NumberExtension|+(self::ClassExtension|get#property(#t86), 1) in let final void #t88 = self::ClassExtension|set#property(#t86, #t87) in #t87);
-  self::expect(n0, let final self::Class* #t89 = v in let final self::Number* #t90 = self::NumberExtension|-(self::ClassExtension|get#property(#t89), 1) in let final void #t91 = self::ClassExtension|set#property(#t89, #t90) in #t90);
-  self::expect(n0, let final self::Class* #t92 = v in let final self::Number* #t93 = self::ClassExtension|get#property(#t92) in let final self::Number* #t94 = self::ClassExtension|set#property(#t92, self::NumberExtension|+(#t93, 1)) in #t93);
-  self::expect(n1, let final self::Class* #t95 = v in let final self::Number* #t96 = self::ClassExtension|get#property(#t95) in let final self::Number* #t97 = self::ClassExtension|set#property(#t95, self::NumberExtension|-(#t96, 1)) in #t96);
+  self::expect(n1, let final self::Class #t71 = v in let final self::Number #t72 = self::NumberExtension|+(self::ClassExtension|get#property(#t71), n1) in let final void #t73 = self::ClassExtension|set#property(#t71, #t72) in #t72);
+  self::expect(n2, let final self::Class #t74 = v in let final self::Number #t75 = self::NumberExtension|+(self::ClassExtension|get#property(#t74), n1) in let final void #t76 = self::ClassExtension|set#property(#t74, #t75) in #t75);
+  self::expect(n0, let final self::Class #t77 = v in let final self::Number #t78 = self::NumberExtension|-(self::ClassExtension|get#property(#t77), n2) in let final void #t79 = self::ClassExtension|set#property(#t77, #t78) in #t78);
+  self::expect(n1, let final self::Class #t80 = v in let final self::Number #t81 = self::NumberExtension|+(self::ClassExtension|get#property(#t80), n1) in let final void #t82 = self::ClassExtension|set#property(#t80, #t81) in #t81);
+  self::expect(n0, let final self::Class #t83 = v in let final self::Number #t84 = self::NumberExtension|-(self::ClassExtension|get#property(#t83), n1) in let final void #t85 = self::ClassExtension|set#property(#t83, #t84) in #t84);
+  self::expect(n1, let final self::Class #t86 = v in let final self::Number #t87 = self::NumberExtension|+(self::ClassExtension|get#property(#t86), 1) in let final void #t88 = self::ClassExtension|set#property(#t86, #t87) in #t87);
+  self::expect(n0, let final self::Class #t89 = v in let final self::Number #t90 = self::NumberExtension|-(self::ClassExtension|get#property(#t89), 1) in let final void #t91 = self::ClassExtension|set#property(#t89, #t90) in #t90);
+  self::expect(n0, let final self::Class #t92 = v in let final self::Number #t93 = self::ClassExtension|get#property(#t92) in let final self::Number #t94 = self::ClassExtension|set#property(#t92, self::NumberExtension|+(#t93, 1)) in #t93);
+  self::expect(n1, let final self::Class #t95 = v in let final self::Number #t96 = self::ClassExtension|get#property(#t95) in let final self::Number #t97 = self::ClassExtension|set#property(#t95, self::NumberExtension|-(#t96, 1)) in #t96);
   self::expect(n0, self::ClassExtension|get#property(v));
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t98 = v in self::ClassExtension|set#property(#t98, self::NumberExtension|+(self::ClassExtension|get#property(#t98), n1));
+  let final self::Class #t98 = v in self::ClassExtension|set#property(#t98, self::NumberExtension|+(self::ClassExtension|get#property(#t98), n1));
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t99 = v in self::ClassExtension|set#property(#t99, self::NumberExtension|+(self::ClassExtension|get#property(#t99), n1));
+  let final self::Class #t99 = v in self::ClassExtension|set#property(#t99, self::NumberExtension|+(self::ClassExtension|get#property(#t99), n1));
   self::expect(n2, self::ClassExtension|get#property(v));
-  let final self::Class* #t100 = v in self::ClassExtension|set#property(#t100, self::NumberExtension|-(self::ClassExtension|get#property(#t100), n2));
+  let final self::Class #t100 = v in self::ClassExtension|set#property(#t100, self::NumberExtension|-(self::ClassExtension|get#property(#t100), n2));
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t101 = v in self::ClassExtension|set#property(#t101, self::NumberExtension|+(self::ClassExtension|get#property(#t101), n1));
+  let final self::Class #t101 = v in self::ClassExtension|set#property(#t101, self::NumberExtension|+(self::ClassExtension|get#property(#t101), n1));
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t102 = v in self::ClassExtension|set#property(#t102, self::NumberExtension|-(self::ClassExtension|get#property(#t102), n1));
+  let final self::Class #t102 = v in self::ClassExtension|set#property(#t102, self::NumberExtension|-(self::ClassExtension|get#property(#t102), n1));
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t103 = v in let final self::Number* #t104 = self::NumberExtension|+(self::ClassExtension|get#property(#t103), 1) in let final void #t105 = self::ClassExtension|set#property(#t103, #t104) in #t104;
+  let final self::Class #t103 = v in let final self::Number #t104 = self::NumberExtension|+(self::ClassExtension|get#property(#t103), 1) in let final void #t105 = self::ClassExtension|set#property(#t103, #t104) in #t104;
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t106 = v in let final self::Number* #t107 = self::NumberExtension|-(self::ClassExtension|get#property(#t106), 1) in let final void #t108 = self::ClassExtension|set#property(#t106, #t107) in #t107;
+  let final self::Class #t106 = v in let final self::Number #t107 = self::NumberExtension|-(self::ClassExtension|get#property(#t106), 1) in let final void #t108 = self::ClassExtension|set#property(#t106, #t107) in #t107;
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t109 = v in self::ClassExtension|set#property(#t109, self::NumberExtension|+(self::ClassExtension|get#property(#t109), 1));
+  let final self::Class #t109 = v in self::ClassExtension|set#property(#t109, self::NumberExtension|+(self::ClassExtension|get#property(#t109), 1));
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t110 = v in self::ClassExtension|set#property(#t110, self::NumberExtension|-(self::ClassExtension|get#property(#t110), 1));
+  let final self::Class #t110 = v in self::ClassExtension|set#property(#t110, self::NumberExtension|-(self::ClassExtension|get#property(#t110), 1));
   self::expect(n0, self::ClassExtension|get#property(v));
 }
 static method testIntProperties() → dynamic {
-  core::int* n0 = 0;
-  core::int* n1 = 1;
-  core::int* n2 = 2;
-  self::IntClass* v = new self::IntClass::•(n0);
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
-  self::expect(n1, let final self::IntClass* #t111 = v in #t111.{self::IntClass::field} = #t111.{self::IntClass::field}{core::int*}.{core::num::+}(n1){(core::num*) →* core::int*});
-  self::expect(n2, let final self::IntClass* #t112 = v in #t112.{self::IntClass::field} = #t112.{self::IntClass::field}{core::int*}.{core::num::+}(n1){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t113 = v in #t113.{self::IntClass::field} = #t113.{self::IntClass::field}{core::int*}.{core::num::-}(n2){(core::num*) →* core::int*});
-  self::expect(n1, let final self::IntClass* #t114 = v in #t114.{self::IntClass::field} = #t114.{self::IntClass::field}{core::int*}.{core::num::+}(n1){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t115 = v in #t115.{self::IntClass::field} = #t115.{self::IntClass::field}{core::int*}.{core::num::-}(n1){(core::num*) →* core::int*});
-  self::expect(n1, let final self::IntClass* #t116 = v in #t116.{self::IntClass::field} = #t116.{self::IntClass::field}{core::int*}.{core::num::+}(1){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t117 = v in #t117.{self::IntClass::field} = #t117.{self::IntClass::field}{core::int*}.{core::num::-}(1){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t118 = v in let final core::int* #t119 = #t118.{self::IntClass::field}{core::int*} in let final core::int* #t120 = #t118.{self::IntClass::field} = #t119.{core::num::+}(1){(core::num*) →* core::int*} in #t119);
-  self::expect(n1, let final self::IntClass* #t121 = v in let final core::int* #t122 = #t121.{self::IntClass::field}{core::int*} in let final core::int* #t123 = #t121.{self::IntClass::field} = #t122.{core::num::-}(1){(core::num*) →* core::int*} in #t122);
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t124 = v in #t124.{self::IntClass::field} = #t124.{self::IntClass::field}{core::int*}.{core::num::+}(n1){(core::num*) →* core::int*};
-  self::expect(n1, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t125 = v in #t125.{self::IntClass::field} = #t125.{self::IntClass::field}{core::int*}.{core::num::+}(n1){(core::num*) →* core::int*};
-  self::expect(n2, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t126 = v in #t126.{self::IntClass::field} = #t126.{self::IntClass::field}{core::int*}.{core::num::-}(n2){(core::num*) →* core::int*};
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t127 = v in #t127.{self::IntClass::field} = #t127.{self::IntClass::field}{core::int*}.{core::num::+}(n1){(core::num*) →* core::int*};
-  self::expect(n1, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t128 = v in #t128.{self::IntClass::field} = #t128.{self::IntClass::field}{core::int*}.{core::num::-}(n1){(core::num*) →* core::int*};
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t129 = v in #t129.{self::IntClass::field} = #t129.{self::IntClass::field}{core::int*}.{core::num::+}(1){(core::num*) →* core::int*};
-  self::expect(n1, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t130 = v in #t130.{self::IntClass::field} = #t130.{self::IntClass::field}{core::int*}.{core::num::-}(1){(core::num*) →* core::int*};
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t131 = v in #t131.{self::IntClass::field} = #t131.{self::IntClass::field}{core::int*}.{core::num::+}(1){(core::num*) →* core::int*};
-  self::expect(n1, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t132 = v in #t132.{self::IntClass::field} = #t132.{self::IntClass::field}{core::int*}.{core::num::-}(1){(core::num*) →* core::int*};
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
+  core::int n0 = 0;
+  core::int n1 = 1;
+  core::int n2 = 2;
+  self::IntClass v = new self::IntClass::•(n0);
+  self::expect(n0, v.{self::IntClass::field}{core::int});
+  self::expect(n1, let final self::IntClass #t111 = v in #t111.{self::IntClass::field} = #t111.{self::IntClass::field}{core::int}.{core::num::+}(n1){(core::num) → core::int});
+  self::expect(n2, let final self::IntClass #t112 = v in #t112.{self::IntClass::field} = #t112.{self::IntClass::field}{core::int}.{core::num::+}(n1){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass #t113 = v in #t113.{self::IntClass::field} = #t113.{self::IntClass::field}{core::int}.{core::num::-}(n2){(core::num) → core::int});
+  self::expect(n1, let final self::IntClass #t114 = v in #t114.{self::IntClass::field} = #t114.{self::IntClass::field}{core::int}.{core::num::+}(n1){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass #t115 = v in #t115.{self::IntClass::field} = #t115.{self::IntClass::field}{core::int}.{core::num::-}(n1){(core::num) → core::int});
+  self::expect(n1, let final self::IntClass #t116 = v in #t116.{self::IntClass::field} = #t116.{self::IntClass::field}{core::int}.{core::num::+}(1){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass #t117 = v in #t117.{self::IntClass::field} = #t117.{self::IntClass::field}{core::int}.{core::num::-}(1){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass #t118 = v in let final core::int #t119 = #t118.{self::IntClass::field}{core::int} in let final core::int #t120 = #t118.{self::IntClass::field} = #t119.{core::num::+}(1){(core::num) → core::int} in #t119);
+  self::expect(n1, let final self::IntClass #t121 = v in let final core::int #t122 = #t121.{self::IntClass::field}{core::int} in let final core::int #t123 = #t121.{self::IntClass::field} = #t122.{core::num::-}(1){(core::num) → core::int} in #t122);
+  self::expect(n0, v.{self::IntClass::field}{core::int});
+  self::expect(n0, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t124 = v in #t124.{self::IntClass::field} = #t124.{self::IntClass::field}{core::int}.{core::num::+}(n1){(core::num) → core::int};
+  self::expect(n1, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t125 = v in #t125.{self::IntClass::field} = #t125.{self::IntClass::field}{core::int}.{core::num::+}(n1){(core::num) → core::int};
+  self::expect(n2, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t126 = v in #t126.{self::IntClass::field} = #t126.{self::IntClass::field}{core::int}.{core::num::-}(n2){(core::num) → core::int};
+  self::expect(n0, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t127 = v in #t127.{self::IntClass::field} = #t127.{self::IntClass::field}{core::int}.{core::num::+}(n1){(core::num) → core::int};
+  self::expect(n1, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t128 = v in #t128.{self::IntClass::field} = #t128.{self::IntClass::field}{core::int}.{core::num::-}(n1){(core::num) → core::int};
+  self::expect(n0, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t129 = v in #t129.{self::IntClass::field} = #t129.{self::IntClass::field}{core::int}.{core::num::+}(1){(core::num) → core::int};
+  self::expect(n1, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t130 = v in #t130.{self::IntClass::field} = #t130.{self::IntClass::field}{core::int}.{core::num::-}(1){(core::num) → core::int};
+  self::expect(n0, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t131 = v in #t131.{self::IntClass::field} = #t131.{self::IntClass::field}{core::int}.{core::num::+}(1){(core::num) → core::int};
+  self::expect(n1, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t132 = v in #t132.{self::IntClass::field} = #t132.{self::IntClass::field}{core::int}.{core::num::-}(1){(core::num) → core::int};
+  self::expect(n0, v.{self::IntClass::field}{core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
-  self::expect(n1, let final self::IntClass* #t133 = v in let final core::int* #t134 = self::IntClassExtension|get#property(#t133).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t135 = self::IntClassExtension|set#property(#t133, #t134) in #t134);
-  self::expect(n2, let final self::IntClass* #t136 = v in let final core::int* #t137 = self::IntClassExtension|get#property(#t136).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t138 = self::IntClassExtension|set#property(#t136, #t137) in #t137);
-  self::expect(n0, let final self::IntClass* #t139 = v in let final core::int* #t140 = self::IntClassExtension|get#property(#t139).{core::num::-}(n2){(core::num*) →* core::int*} in let final void #t141 = self::IntClassExtension|set#property(#t139, #t140) in #t140);
-  self::expect(n1, let final self::IntClass* #t142 = v in let final core::int* #t143 = self::IntClassExtension|get#property(#t142).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t144 = self::IntClassExtension|set#property(#t142, #t143) in #t143);
-  self::expect(n0, let final self::IntClass* #t145 = v in let final core::int* #t146 = self::IntClassExtension|get#property(#t145).{core::num::-}(n1){(core::num*) →* core::int*} in let final void #t147 = self::IntClassExtension|set#property(#t145, #t146) in #t146);
-  self::expect(n1, let final self::IntClass* #t148 = v in let final core::int* #t149 = self::IntClassExtension|get#property(#t148).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t150 = self::IntClassExtension|set#property(#t148, #t149) in #t149);
-  self::expect(n0, let final self::IntClass* #t151 = v in let final core::int* #t152 = self::IntClassExtension|get#property(#t151).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t153 = self::IntClassExtension|set#property(#t151, #t152) in #t152);
-  self::expect(n0, let final self::IntClass* #t154 = v in let final core::int* #t155 = self::IntClassExtension|get#property(#t154) in let final core::int* #t156 = self::IntClassExtension|set#property(#t154, #t155.{core::num::+}(1){(core::num*) →* core::int*}) in #t155);
-  self::expect(n1, let final self::IntClass* #t157 = v in let final core::int* #t158 = self::IntClassExtension|get#property(#t157) in let final core::int* #t159 = self::IntClassExtension|set#property(#t157, #t158.{core::num::-}(1){(core::num*) →* core::int*}) in #t158);
+  self::expect(n1, let final self::IntClass #t133 = v in let final core::int #t134 = self::IntClassExtension|get#property(#t133).{core::num::+}(n1){(core::num) → core::int} in let final void #t135 = self::IntClassExtension|set#property(#t133, #t134) in #t134);
+  self::expect(n2, let final self::IntClass #t136 = v in let final core::int #t137 = self::IntClassExtension|get#property(#t136).{core::num::+}(n1){(core::num) → core::int} in let final void #t138 = self::IntClassExtension|set#property(#t136, #t137) in #t137);
+  self::expect(n0, let final self::IntClass #t139 = v in let final core::int #t140 = self::IntClassExtension|get#property(#t139).{core::num::-}(n2){(core::num) → core::int} in let final void #t141 = self::IntClassExtension|set#property(#t139, #t140) in #t140);
+  self::expect(n1, let final self::IntClass #t142 = v in let final core::int #t143 = self::IntClassExtension|get#property(#t142).{core::num::+}(n1){(core::num) → core::int} in let final void #t144 = self::IntClassExtension|set#property(#t142, #t143) in #t143);
+  self::expect(n0, let final self::IntClass #t145 = v in let final core::int #t146 = self::IntClassExtension|get#property(#t145).{core::num::-}(n1){(core::num) → core::int} in let final void #t147 = self::IntClassExtension|set#property(#t145, #t146) in #t146);
+  self::expect(n1, let final self::IntClass #t148 = v in let final core::int #t149 = self::IntClassExtension|get#property(#t148).{core::num::+}(1){(core::num) → core::int} in let final void #t150 = self::IntClassExtension|set#property(#t148, #t149) in #t149);
+  self::expect(n0, let final self::IntClass #t151 = v in let final core::int #t152 = self::IntClassExtension|get#property(#t151).{core::num::-}(1){(core::num) → core::int} in let final void #t153 = self::IntClassExtension|set#property(#t151, #t152) in #t152);
+  self::expect(n0, let final self::IntClass #t154 = v in let final core::int #t155 = self::IntClassExtension|get#property(#t154) in let final core::int #t156 = self::IntClassExtension|set#property(#t154, #t155.{core::num::+}(1){(core::num) → core::int}) in #t155);
+  self::expect(n1, let final self::IntClass #t157 = v in let final core::int #t158 = self::IntClassExtension|get#property(#t157) in let final core::int #t159 = self::IntClassExtension|set#property(#t157, #t158.{core::num::-}(1){(core::num) → core::int}) in #t158);
   self::expect(n0, self::IntClassExtension|get#property(v));
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t160 = v in self::IntClassExtension|set#property(#t160, self::IntClassExtension|get#property(#t160).{core::num::+}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t160 = v in self::IntClassExtension|set#property(#t160, self::IntClassExtension|get#property(#t160).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t161 = v in self::IntClassExtension|set#property(#t161, self::IntClassExtension|get#property(#t161).{core::num::+}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t161 = v in self::IntClassExtension|set#property(#t161, self::IntClassExtension|get#property(#t161).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n2, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t162 = v in self::IntClassExtension|set#property(#t162, self::IntClassExtension|get#property(#t162).{core::num::-}(n2){(core::num*) →* core::int*});
+  let final self::IntClass #t162 = v in self::IntClassExtension|set#property(#t162, self::IntClassExtension|get#property(#t162).{core::num::-}(n2){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t163 = v in self::IntClassExtension|set#property(#t163, self::IntClassExtension|get#property(#t163).{core::num::+}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t163 = v in self::IntClassExtension|set#property(#t163, self::IntClassExtension|get#property(#t163).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t164 = v in self::IntClassExtension|set#property(#t164, self::IntClassExtension|get#property(#t164).{core::num::-}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t164 = v in self::IntClassExtension|set#property(#t164, self::IntClassExtension|get#property(#t164).{core::num::-}(n1){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t165 = v in let final core::int* #t166 = self::IntClassExtension|get#property(#t165).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t167 = self::IntClassExtension|set#property(#t165, #t166) in #t166;
+  let final self::IntClass #t165 = v in let final core::int #t166 = self::IntClassExtension|get#property(#t165).{core::num::+}(1){(core::num) → core::int} in let final void #t167 = self::IntClassExtension|set#property(#t165, #t166) in #t166;
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t168 = v in let final core::int* #t169 = self::IntClassExtension|get#property(#t168).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t170 = self::IntClassExtension|set#property(#t168, #t169) in #t169;
+  let final self::IntClass #t168 = v in let final core::int #t169 = self::IntClassExtension|get#property(#t168).{core::num::-}(1){(core::num) → core::int} in let final void #t170 = self::IntClassExtension|set#property(#t168, #t169) in #t169;
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t171 = v in self::IntClassExtension|set#property(#t171, self::IntClassExtension|get#property(#t171).{core::num::+}(1){(core::num*) →* core::int*});
+  let final self::IntClass #t171 = v in self::IntClassExtension|set#property(#t171, self::IntClassExtension|get#property(#t171).{core::num::+}(1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t172 = v in self::IntClassExtension|set#property(#t172, self::IntClassExtension|get#property(#t172).{core::num::-}(1){(core::num*) →* core::int*});
+  let final self::IntClass #t172 = v in self::IntClassExtension|set#property(#t172, self::IntClassExtension|get#property(#t172).{core::num::-}(1){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
 }
 static method testExplicitProperties() → dynamic {
-  self::Number* n0 = new self::Number::•(0);
-  self::Number* n1 = new self::Number::•(1);
-  self::Number* n2 = new self::Number::•(2);
-  self::Class* v = new self::Class::•(n0);
+  self::Number n0 = new self::Number::•(0);
+  self::Number n1 = new self::Number::•(1);
+  self::Number n2 = new self::Number::•(2);
+  self::Class v = new self::Class::•(n0);
   self::expect(n0, self::ClassExtension|get#property(v));
-  self::expect(n1, let final self::Class* #t173 = v in let final self::Number* #t174 = self::NumberExtension|+(self::ClassExtension|get#property(#t173), n1) in let final void #t175 = self::ClassExtension|set#property(#t173, #t174) in #t174);
-  self::expect(n2, let final self::Class* #t176 = v in let final self::Number* #t177 = self::NumberExtension|+(self::ClassExtension|get#property(#t176), n1) in let final void #t178 = self::ClassExtension|set#property(#t176, #t177) in #t177);
-  self::expect(n0, let final self::Class* #t179 = v in let final self::Number* #t180 = self::NumberExtension|-(self::ClassExtension|get#property(#t179), n2) in let final void #t181 = self::ClassExtension|set#property(#t179, #t180) in #t180);
-  self::expect(n1, let final self::Class* #t182 = v in let final self::Number* #t183 = self::NumberExtension|+(self::ClassExtension|get#property(#t182), n1) in let final void #t184 = self::ClassExtension|set#property(#t182, #t183) in #t183);
-  self::expect(n0, let final self::Class* #t185 = v in let final self::Number* #t186 = self::NumberExtension|-(self::ClassExtension|get#property(#t185), n1) in let final void #t187 = self::ClassExtension|set#property(#t185, #t186) in #t186);
-  self::expect(n1, let final self::Class* #t188 = v in let final self::Number* #t189 = self::NumberExtension|+(self::ClassExtension|get#property(#t188), 1) in let final void #t190 = self::ClassExtension|set#property(#t188, #t189) in #t189);
-  self::expect(n0, let final self::Class* #t191 = v in let final self::Number* #t192 = self::NumberExtension|-(self::ClassExtension|get#property(#t191), 1) in let final void #t193 = self::ClassExtension|set#property(#t191, #t192) in #t192);
-  self::expect(n0, let final self::Class* #t194 = v in let final self::Number* #t195 = self::ClassExtension|get#property(#t194) in let final self::Number* #t196 = let final self::Number* #t197 = self::NumberExtension|+(#t195, 1) in let final void #t198 = self::ClassExtension|set#property(#t194, #t197) in #t197 in #t195);
-  self::expect(n1, let final self::Class* #t199 = v in let final self::Number* #t200 = self::ClassExtension|get#property(#t199) in let final self::Number* #t201 = let final self::Number* #t202 = self::NumberExtension|-(#t200, 1) in let final void #t203 = self::ClassExtension|set#property(#t199, #t202) in #t202 in #t200);
+  self::expect(n1, let final self::Class #t173 = v in let final self::Number #t174 = self::NumberExtension|+(self::ClassExtension|get#property(#t173), n1) in let final void #t175 = self::ClassExtension|set#property(#t173, #t174) in #t174);
+  self::expect(n2, let final self::Class #t176 = v in let final self::Number #t177 = self::NumberExtension|+(self::ClassExtension|get#property(#t176), n1) in let final void #t178 = self::ClassExtension|set#property(#t176, #t177) in #t177);
+  self::expect(n0, let final self::Class #t179 = v in let final self::Number #t180 = self::NumberExtension|-(self::ClassExtension|get#property(#t179), n2) in let final void #t181 = self::ClassExtension|set#property(#t179, #t180) in #t180);
+  self::expect(n1, let final self::Class #t182 = v in let final self::Number #t183 = self::NumberExtension|+(self::ClassExtension|get#property(#t182), n1) in let final void #t184 = self::ClassExtension|set#property(#t182, #t183) in #t183);
+  self::expect(n0, let final self::Class #t185 = v in let final self::Number #t186 = self::NumberExtension|-(self::ClassExtension|get#property(#t185), n1) in let final void #t187 = self::ClassExtension|set#property(#t185, #t186) in #t186);
+  self::expect(n1, let final self::Class #t188 = v in let final self::Number #t189 = self::NumberExtension|+(self::ClassExtension|get#property(#t188), 1) in let final void #t190 = self::ClassExtension|set#property(#t188, #t189) in #t189);
+  self::expect(n0, let final self::Class #t191 = v in let final self::Number #t192 = self::NumberExtension|-(self::ClassExtension|get#property(#t191), 1) in let final void #t193 = self::ClassExtension|set#property(#t191, #t192) in #t192);
+  self::expect(n0, let final self::Class #t194 = v in let final self::Number #t195 = self::ClassExtension|get#property(#t194) in let final self::Number #t196 = let final self::Number #t197 = self::NumberExtension|+(#t195, 1) in let final void #t198 = self::ClassExtension|set#property(#t194, #t197) in #t197 in #t195);
+  self::expect(n1, let final self::Class #t199 = v in let final self::Number #t200 = self::ClassExtension|get#property(#t199) in let final self::Number #t201 = let final self::Number #t202 = self::NumberExtension|-(#t200, 1) in let final void #t203 = self::ClassExtension|set#property(#t199, #t202) in #t202 in #t200);
   self::expect(n0, self::ClassExtension|get#property(v));
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t204 = v in self::ClassExtension|set#property(#t204, self::NumberExtension|+(self::ClassExtension|get#property(#t204), n1));
+  let final self::Class #t204 = v in self::ClassExtension|set#property(#t204, self::NumberExtension|+(self::ClassExtension|get#property(#t204), n1));
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t205 = v in self::ClassExtension|set#property(#t205, self::NumberExtension|+(self::ClassExtension|get#property(#t205), n1));
+  let final self::Class #t205 = v in self::ClassExtension|set#property(#t205, self::NumberExtension|+(self::ClassExtension|get#property(#t205), n1));
   self::expect(n2, self::ClassExtension|get#property(v));
-  let final self::Class* #t206 = v in self::ClassExtension|set#property(#t206, self::NumberExtension|-(self::ClassExtension|get#property(#t206), n2));
+  let final self::Class #t206 = v in self::ClassExtension|set#property(#t206, self::NumberExtension|-(self::ClassExtension|get#property(#t206), n2));
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t207 = v in self::ClassExtension|set#property(#t207, self::NumberExtension|+(self::ClassExtension|get#property(#t207), n1));
+  let final self::Class #t207 = v in self::ClassExtension|set#property(#t207, self::NumberExtension|+(self::ClassExtension|get#property(#t207), n1));
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t208 = v in self::ClassExtension|set#property(#t208, self::NumberExtension|-(self::ClassExtension|get#property(#t208), n1));
+  let final self::Class #t208 = v in self::ClassExtension|set#property(#t208, self::NumberExtension|-(self::ClassExtension|get#property(#t208), n1));
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t209 = v in let final self::Number* #t210 = self::NumberExtension|+(self::ClassExtension|get#property(#t209), 1) in let final void #t211 = self::ClassExtension|set#property(#t209, #t210) in #t210;
+  let final self::Class #t209 = v in let final self::Number #t210 = self::NumberExtension|+(self::ClassExtension|get#property(#t209), 1) in let final void #t211 = self::ClassExtension|set#property(#t209, #t210) in #t210;
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t212 = v in let final self::Number* #t213 = self::NumberExtension|-(self::ClassExtension|get#property(#t212), 1) in let final void #t214 = self::ClassExtension|set#property(#t212, #t213) in #t213;
+  let final self::Class #t212 = v in let final self::Number #t213 = self::NumberExtension|-(self::ClassExtension|get#property(#t212), 1) in let final void #t214 = self::ClassExtension|set#property(#t212, #t213) in #t213;
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t215 = v in self::ClassExtension|set#property(#t215, self::NumberExtension|+(self::ClassExtension|get#property(#t215), 1));
+  let final self::Class #t215 = v in self::ClassExtension|set#property(#t215, self::NumberExtension|+(self::ClassExtension|get#property(#t215), 1));
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t216 = v in self::ClassExtension|set#property(#t216, self::NumberExtension|-(self::ClassExtension|get#property(#t216), 1));
+  let final self::Class #t216 = v in self::ClassExtension|set#property(#t216, self::NumberExtension|-(self::ClassExtension|get#property(#t216), 1));
   self::expect(n0, self::ClassExtension|get#property(v));
 }
 static method testExplicitIntProperties() → dynamic {
-  core::int* n0 = 0;
-  core::int* n1 = 1;
-  core::int* n2 = 2;
-  self::IntClass* v = new self::IntClass::•(n0);
+  core::int n0 = 0;
+  core::int n1 = 1;
+  core::int n2 = 2;
+  self::IntClass v = new self::IntClass::•(n0);
   self::expect(n0, self::IntClassExtension|get#property(v));
-  self::expect(n1, let final self::IntClass* #t217 = v in let final core::int* #t218 = self::IntClassExtension|get#property(#t217).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t219 = self::IntClassExtension|set#property(#t217, #t218) in #t218);
-  self::expect(n2, let final self::IntClass* #t220 = v in let final core::int* #t221 = self::IntClassExtension|get#property(#t220).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t222 = self::IntClassExtension|set#property(#t220, #t221) in #t221);
-  self::expect(n0, let final self::IntClass* #t223 = v in let final core::int* #t224 = self::IntClassExtension|get#property(#t223).{core::num::-}(n2){(core::num*) →* core::int*} in let final void #t225 = self::IntClassExtension|set#property(#t223, #t224) in #t224);
-  self::expect(n1, let final self::IntClass* #t226 = v in let final core::int* #t227 = self::IntClassExtension|get#property(#t226).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t228 = self::IntClassExtension|set#property(#t226, #t227) in #t227);
-  self::expect(n0, let final self::IntClass* #t229 = v in let final core::int* #t230 = self::IntClassExtension|get#property(#t229).{core::num::-}(n1){(core::num*) →* core::int*} in let final void #t231 = self::IntClassExtension|set#property(#t229, #t230) in #t230);
-  self::expect(n1, let final self::IntClass* #t232 = v in let final core::int* #t233 = self::IntClassExtension|get#property(#t232).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t234 = self::IntClassExtension|set#property(#t232, #t233) in #t233);
-  self::expect(n0, let final self::IntClass* #t235 = v in let final core::int* #t236 = self::IntClassExtension|get#property(#t235).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t237 = self::IntClassExtension|set#property(#t235, #t236) in #t236);
-  self::expect(n0, let final self::IntClass* #t238 = v in let final core::int* #t239 = self::IntClassExtension|get#property(#t238) in let final core::int* #t240 = let final core::int* #t241 = #t239.{core::num::+}(1){(core::num*) →* core::int*} in let final void #t242 = self::IntClassExtension|set#property(#t238, #t241) in #t241 in #t239);
-  self::expect(n1, let final self::IntClass* #t243 = v in let final core::int* #t244 = self::IntClassExtension|get#property(#t243) in let final core::int* #t245 = let final core::int* #t246 = #t244.{core::num::-}(1){(core::num*) →* core::int*} in let final void #t247 = self::IntClassExtension|set#property(#t243, #t246) in #t246 in #t244);
+  self::expect(n1, let final self::IntClass #t217 = v in let final core::int #t218 = self::IntClassExtension|get#property(#t217).{core::num::+}(n1){(core::num) → core::int} in let final void #t219 = self::IntClassExtension|set#property(#t217, #t218) in #t218);
+  self::expect(n2, let final self::IntClass #t220 = v in let final core::int #t221 = self::IntClassExtension|get#property(#t220).{core::num::+}(n1){(core::num) → core::int} in let final void #t222 = self::IntClassExtension|set#property(#t220, #t221) in #t221);
+  self::expect(n0, let final self::IntClass #t223 = v in let final core::int #t224 = self::IntClassExtension|get#property(#t223).{core::num::-}(n2){(core::num) → core::int} in let final void #t225 = self::IntClassExtension|set#property(#t223, #t224) in #t224);
+  self::expect(n1, let final self::IntClass #t226 = v in let final core::int #t227 = self::IntClassExtension|get#property(#t226).{core::num::+}(n1){(core::num) → core::int} in let final void #t228 = self::IntClassExtension|set#property(#t226, #t227) in #t227);
+  self::expect(n0, let final self::IntClass #t229 = v in let final core::int #t230 = self::IntClassExtension|get#property(#t229).{core::num::-}(n1){(core::num) → core::int} in let final void #t231 = self::IntClassExtension|set#property(#t229, #t230) in #t230);
+  self::expect(n1, let final self::IntClass #t232 = v in let final core::int #t233 = self::IntClassExtension|get#property(#t232).{core::num::+}(1){(core::num) → core::int} in let final void #t234 = self::IntClassExtension|set#property(#t232, #t233) in #t233);
+  self::expect(n0, let final self::IntClass #t235 = v in let final core::int #t236 = self::IntClassExtension|get#property(#t235).{core::num::-}(1){(core::num) → core::int} in let final void #t237 = self::IntClassExtension|set#property(#t235, #t236) in #t236);
+  self::expect(n0, let final self::IntClass #t238 = v in let final core::int #t239 = self::IntClassExtension|get#property(#t238) in let final core::int #t240 = let final core::int #t241 = #t239.{core::num::+}(1){(core::num) → core::int} in let final void #t242 = self::IntClassExtension|set#property(#t238, #t241) in #t241 in #t239);
+  self::expect(n1, let final self::IntClass #t243 = v in let final core::int #t244 = self::IntClassExtension|get#property(#t243) in let final core::int #t245 = let final core::int #t246 = #t244.{core::num::-}(1){(core::num) → core::int} in let final void #t247 = self::IntClassExtension|set#property(#t243, #t246) in #t246 in #t244);
   self::expect(n0, self::IntClassExtension|get#property(v));
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t248 = v in self::IntClassExtension|set#property(#t248, self::IntClassExtension|get#property(#t248).{core::num::+}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t248 = v in self::IntClassExtension|set#property(#t248, self::IntClassExtension|get#property(#t248).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t249 = v in self::IntClassExtension|set#property(#t249, self::IntClassExtension|get#property(#t249).{core::num::+}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t249 = v in self::IntClassExtension|set#property(#t249, self::IntClassExtension|get#property(#t249).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n2, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t250 = v in self::IntClassExtension|set#property(#t250, self::IntClassExtension|get#property(#t250).{core::num::-}(n2){(core::num*) →* core::int*});
+  let final self::IntClass #t250 = v in self::IntClassExtension|set#property(#t250, self::IntClassExtension|get#property(#t250).{core::num::-}(n2){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t251 = v in self::IntClassExtension|set#property(#t251, self::IntClassExtension|get#property(#t251).{core::num::+}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t251 = v in self::IntClassExtension|set#property(#t251, self::IntClassExtension|get#property(#t251).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t252 = v in self::IntClassExtension|set#property(#t252, self::IntClassExtension|get#property(#t252).{core::num::-}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t252 = v in self::IntClassExtension|set#property(#t252, self::IntClassExtension|get#property(#t252).{core::num::-}(n1){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t253 = v in let final core::int* #t254 = self::IntClassExtension|get#property(#t253).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t255 = self::IntClassExtension|set#property(#t253, #t254) in #t254;
+  let final self::IntClass #t253 = v in let final core::int #t254 = self::IntClassExtension|get#property(#t253).{core::num::+}(1){(core::num) → core::int} in let final void #t255 = self::IntClassExtension|set#property(#t253, #t254) in #t254;
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t256 = v in let final core::int* #t257 = self::IntClassExtension|get#property(#t256).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t258 = self::IntClassExtension|set#property(#t256, #t257) in #t257;
+  let final self::IntClass #t256 = v in let final core::int #t257 = self::IntClassExtension|get#property(#t256).{core::num::-}(1){(core::num) → core::int} in let final void #t258 = self::IntClassExtension|set#property(#t256, #t257) in #t257;
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t259 = v in self::IntClassExtension|set#property(#t259, self::IntClassExtension|get#property(#t259).{core::num::+}(1){(core::num*) →* core::int*});
+  let final self::IntClass #t259 = v in self::IntClassExtension|set#property(#t259, self::IntClassExtension|get#property(#t259).{core::num::+}(1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t260 = v in self::IntClassExtension|set#property(#t260, self::IntClassExtension|get#property(#t260).{core::num::-}(1){(core::num*) →* core::int*});
+  let final self::IntClass #t260 = v in self::IntClassExtension|set#property(#t260, self::IntClassExtension|get#property(#t260).{core::num::-}(1){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
 }
-static method testExplicitNullAwareProperties(self::Class* v) → dynamic {
-  self::Number* n0 = new self::Number::•(0);
-  self::Number* n1 = new self::Number::•(1);
-  self::Number* n2 = new self::Number::•(2);
-  self::expect(n0, let final self::Class* #t261 = v in #t261 == null ?{self::Number*} null : self::ClassExtension|get#property(#t261), v == null);
-  self::expect(n1, let final self::Class* #t262 = v in #t262 == null ?{self::Number*} null : let final self::Number* #t263 = self::NumberExtension|+(self::ClassExtension|get#property(#t262), n1) in let final void #t264 = self::ClassExtension|set#property(#t262, #t263) in #t263, v == null);
-  self::expect(n2, let final self::Class* #t265 = v in #t265 == null ?{self::Number*} null : let final self::Number* #t266 = self::NumberExtension|+(self::ClassExtension|get#property(#t265), n1) in let final void #t267 = self::ClassExtension|set#property(#t265, #t266) in #t266, v == null);
-  self::expect(n0, let final self::Class* #t268 = v in #t268 == null ?{self::Number*} null : let final self::Number* #t269 = self::NumberExtension|-(self::ClassExtension|get#property(#t268), n2) in let final void #t270 = self::ClassExtension|set#property(#t268, #t269) in #t269, v == null);
-  self::expect(n1, let final self::Class* #t271 = v in #t271 == null ?{self::Number*} null : let final self::Number* #t272 = self::NumberExtension|+(self::ClassExtension|get#property(#t271), n1) in let final void #t273 = self::ClassExtension|set#property(#t271, #t272) in #t272, v == null);
-  self::expect(n0, let final self::Class* #t274 = v in #t274 == null ?{self::Number*} null : let final self::Number* #t275 = self::NumberExtension|-(self::ClassExtension|get#property(#t274), n1) in let final void #t276 = self::ClassExtension|set#property(#t274, #t275) in #t275, v == null);
-  self::expect(n1, let final self::Class* #t277 = v in #t277 == null ?{self::Number*} null : let final self::Number* #t278 = self::NumberExtension|+(self::ClassExtension|get#property(#t277), 1) in let final void #t279 = self::ClassExtension|set#property(#t277, #t278) in #t278, v == null);
-  self::expect(n0, let final self::Class* #t280 = v in #t280 == null ?{self::Number*} null : let final self::Number* #t281 = self::NumberExtension|-(self::ClassExtension|get#property(#t280), 1) in let final void #t282 = self::ClassExtension|set#property(#t280, #t281) in #t281, v == null);
-  self::expect(n0, let final self::Class* #t283 = v in #t283 == null ?{self::Number*} null : let final self::Number* #t284 = self::ClassExtension|get#property(#t283) in let final self::Number* #t285 = let final self::Number* #t286 = self::NumberExtension|+(#t284, 1) in let final void #t287 = self::ClassExtension|set#property(#t283, #t286) in #t286 in #t284, v == null);
-  self::expect(n1, let final self::Class* #t288 = v in #t288 == null ?{self::Number*} null : let final self::Number* #t289 = self::ClassExtension|get#property(#t288) in let final self::Number* #t290 = let final self::Number* #t291 = self::NumberExtension|-(#t289, 1) in let final void #t292 = self::ClassExtension|set#property(#t288, #t291) in #t291 in #t289, v == null);
-  self::expect(n0, let final self::Class* #t293 = v in #t293 == null ?{self::Number*} null : self::ClassExtension|get#property(#t293), v == null);
-  self::expect(n0, let final self::Class* #t294 = v in #t294 == null ?{self::Number*} null : self::ClassExtension|get#property(#t294), v == null);
-  let final self::Class* #t295 = v in #t295 == null ?{self::Number*} null : self::ClassExtension|set#property(#t295, self::NumberExtension|+(self::ClassExtension|get#property(#t295), n1));
-  self::expect(n1, let final self::Class* #t296 = v in #t296 == null ?{self::Number*} null : self::ClassExtension|get#property(#t296), v == null);
-  let final self::Class* #t297 = v in #t297 == null ?{self::Number*} null : self::ClassExtension|set#property(#t297, self::NumberExtension|+(self::ClassExtension|get#property(#t297), n1));
-  self::expect(n2, let final self::Class* #t298 = v in #t298 == null ?{self::Number*} null : self::ClassExtension|get#property(#t298), v == null);
-  let final self::Class* #t299 = v in #t299 == null ?{self::Number*} null : self::ClassExtension|set#property(#t299, self::NumberExtension|-(self::ClassExtension|get#property(#t299), n2));
-  self::expect(n0, let final self::Class* #t300 = v in #t300 == null ?{self::Number*} null : self::ClassExtension|get#property(#t300), v == null);
-  let final self::Class* #t301 = v in #t301 == null ?{self::Number*} null : self::ClassExtension|set#property(#t301, self::NumberExtension|+(self::ClassExtension|get#property(#t301), n1));
-  self::expect(n1, let final self::Class* #t302 = v in #t302 == null ?{self::Number*} null : self::ClassExtension|get#property(#t302), v == null);
-  let final self::Class* #t303 = v in #t303 == null ?{self::Number*} null : self::ClassExtension|set#property(#t303, self::NumberExtension|-(self::ClassExtension|get#property(#t303), n1));
-  self::expect(n0, let final self::Class* #t304 = v in #t304 == null ?{self::Number*} null : self::ClassExtension|get#property(#t304), v == null);
-  let final self::Class* #t305 = v in #t305 == null ?{self::Number*} null : let final self::Number* #t306 = self::NumberExtension|+(self::ClassExtension|get#property(#t305), 1) in let final void #t307 = self::ClassExtension|set#property(#t305, #t306) in #t306;
-  self::expect(n1, let final self::Class* #t308 = v in #t308 == null ?{self::Number*} null : self::ClassExtension|get#property(#t308), v == null);
-  let final self::Class* #t309 = v in #t309 == null ?{self::Number*} null : let final self::Number* #t310 = self::NumberExtension|-(self::ClassExtension|get#property(#t309), 1) in let final void #t311 = self::ClassExtension|set#property(#t309, #t310) in #t310;
-  self::expect(n0, let final self::Class* #t312 = v in #t312 == null ?{self::Number*} null : self::ClassExtension|get#property(#t312), v == null);
-  let final self::Class* #t313 = v in #t313 == null ?{self::Number*} null : self::ClassExtension|set#property(#t313, self::NumberExtension|+(self::ClassExtension|get#property(#t313), 1));
-  self::expect(n1, let final self::Class* #t314 = v in #t314 == null ?{self::Number*} null : self::ClassExtension|get#property(#t314), v == null);
-  let final self::Class* #t315 = v in #t315 == null ?{self::Number*} null : self::ClassExtension|set#property(#t315, self::NumberExtension|-(self::ClassExtension|get#property(#t315), 1));
-  self::expect(n0, let final self::Class* #t316 = v in #t316 == null ?{self::Number*} null : self::ClassExtension|get#property(#t316), v == null);
+static method testExplicitNullAwareProperties(self::Class? v) → dynamic {
+  self::Number n0 = new self::Number::•(0);
+  self::Number n1 = new self::Number::•(1);
+  self::Number n2 = new self::Number::•(2);
+  self::expect(n0, let final self::Class? #t261 = v in #t261 == null ?{self::Number?} null : self::ClassExtension|get#property(#t261{self::Class}), v == null);
+  self::expect(n1, let final self::Class? #t262 = v in #t262 == null ?{self::Number?} null : let final self::Number #t263 = self::NumberExtension|+(self::ClassExtension|get#property(#t262{self::Class}), n1) in let final void #t264 = self::ClassExtension|set#property(#t262{self::Class}, #t263) in #t263, v == null);
+  self::expect(n2, let final self::Class? #t265 = v in #t265 == null ?{self::Number?} null : let final self::Number #t266 = self::NumberExtension|+(self::ClassExtension|get#property(#t265{self::Class}), n1) in let final void #t267 = self::ClassExtension|set#property(#t265{self::Class}, #t266) in #t266, v == null);
+  self::expect(n0, let final self::Class? #t268 = v in #t268 == null ?{self::Number?} null : let final self::Number #t269 = self::NumberExtension|-(self::ClassExtension|get#property(#t268{self::Class}), n2) in let final void #t270 = self::ClassExtension|set#property(#t268{self::Class}, #t269) in #t269, v == null);
+  self::expect(n1, let final self::Class? #t271 = v in #t271 == null ?{self::Number?} null : let final self::Number #t272 = self::NumberExtension|+(self::ClassExtension|get#property(#t271{self::Class}), n1) in let final void #t273 = self::ClassExtension|set#property(#t271{self::Class}, #t272) in #t272, v == null);
+  self::expect(n0, let final self::Class? #t274 = v in #t274 == null ?{self::Number?} null : let final self::Number #t275 = self::NumberExtension|-(self::ClassExtension|get#property(#t274{self::Class}), n1) in let final void #t276 = self::ClassExtension|set#property(#t274{self::Class}, #t275) in #t275, v == null);
+  self::expect(n1, let final self::Class? #t277 = v in #t277 == null ?{self::Number?} null : let final self::Number #t278 = self::NumberExtension|+(self::ClassExtension|get#property(#t277{self::Class}), 1) in let final void #t279 = self::ClassExtension|set#property(#t277{self::Class}, #t278) in #t278, v == null);
+  self::expect(n0, let final self::Class? #t280 = v in #t280 == null ?{self::Number?} null : let final self::Number #t281 = self::NumberExtension|-(self::ClassExtension|get#property(#t280{self::Class}), 1) in let final void #t282 = self::ClassExtension|set#property(#t280{self::Class}, #t281) in #t281, v == null);
+  self::expect(n0, let final self::Class? #t283 = v in #t283 == null ?{self::Number?} null : let final self::Number #t284 = self::ClassExtension|get#property(#t283{self::Class}) in let final self::Number #t285 = let final self::Number #t286 = self::NumberExtension|+(#t284, 1) in let final void #t287 = self::ClassExtension|set#property(#t283{self::Class}, #t286) in #t286 in #t284, v == null);
+  self::expect(n1, let final self::Class? #t288 = v in #t288 == null ?{self::Number?} null : let final self::Number #t289 = self::ClassExtension|get#property(#t288{self::Class}) in let final self::Number #t290 = let final self::Number #t291 = self::NumberExtension|-(#t289, 1) in let final void #t292 = self::ClassExtension|set#property(#t288{self::Class}, #t291) in #t291 in #t289, v == null);
+  self::expect(n0, let final self::Class? #t293 = v in #t293 == null ?{self::Number?} null : self::ClassExtension|get#property(#t293{self::Class}), v == null);
+  self::expect(n0, let final self::Class? #t294 = v in #t294 == null ?{self::Number?} null : self::ClassExtension|get#property(#t294{self::Class}), v == null);
+  let final self::Class? #t295 = v in #t295 == null ?{self::Number?} null : self::ClassExtension|set#property(#t295{self::Class}, self::NumberExtension|+(self::ClassExtension|get#property(#t295{self::Class}), n1));
+  self::expect(n1, let final self::Class? #t296 = v in #t296 == null ?{self::Number?} null : self::ClassExtension|get#property(#t296{self::Class}), v == null);
+  let final self::Class? #t297 = v in #t297 == null ?{self::Number?} null : self::ClassExtension|set#property(#t297{self::Class}, self::NumberExtension|+(self::ClassExtension|get#property(#t297{self::Class}), n1));
+  self::expect(n2, let final self::Class? #t298 = v in #t298 == null ?{self::Number?} null : self::ClassExtension|get#property(#t298{self::Class}), v == null);
+  let final self::Class? #t299 = v in #t299 == null ?{self::Number?} null : self::ClassExtension|set#property(#t299{self::Class}, self::NumberExtension|-(self::ClassExtension|get#property(#t299{self::Class}), n2));
+  self::expect(n0, let final self::Class? #t300 = v in #t300 == null ?{self::Number?} null : self::ClassExtension|get#property(#t300{self::Class}), v == null);
+  let final self::Class? #t301 = v in #t301 == null ?{self::Number?} null : self::ClassExtension|set#property(#t301{self::Class}, self::NumberExtension|+(self::ClassExtension|get#property(#t301{self::Class}), n1));
+  self::expect(n1, let final self::Class? #t302 = v in #t302 == null ?{self::Number?} null : self::ClassExtension|get#property(#t302{self::Class}), v == null);
+  let final self::Class? #t303 = v in #t303 == null ?{self::Number?} null : self::ClassExtension|set#property(#t303{self::Class}, self::NumberExtension|-(self::ClassExtension|get#property(#t303{self::Class}), n1));
+  self::expect(n0, let final self::Class? #t304 = v in #t304 == null ?{self::Number?} null : self::ClassExtension|get#property(#t304{self::Class}), v == null);
+  let final self::Class? #t305 = v in #t305 == null ?{self::Number?} null : let final self::Number #t306 = self::NumberExtension|+(self::ClassExtension|get#property(#t305{self::Class}), 1) in let final void #t307 = self::ClassExtension|set#property(#t305{self::Class}, #t306) in #t306;
+  self::expect(n1, let final self::Class? #t308 = v in #t308 == null ?{self::Number?} null : self::ClassExtension|get#property(#t308{self::Class}), v == null);
+  let final self::Class? #t309 = v in #t309 == null ?{self::Number?} null : let final self::Number #t310 = self::NumberExtension|-(self::ClassExtension|get#property(#t309{self::Class}), 1) in let final void #t311 = self::ClassExtension|set#property(#t309{self::Class}, #t310) in #t310;
+  self::expect(n0, let final self::Class? #t312 = v in #t312 == null ?{self::Number?} null : self::ClassExtension|get#property(#t312{self::Class}), v == null);
+  let final self::Class? #t313 = v in #t313 == null ?{self::Number?} null : self::ClassExtension|set#property(#t313{self::Class}, self::NumberExtension|+(self::ClassExtension|get#property(#t313{self::Class}), 1));
+  self::expect(n1, let final self::Class? #t314 = v in #t314 == null ?{self::Number?} null : self::ClassExtension|get#property(#t314{self::Class}), v == null);
+  let final self::Class? #t315 = v in #t315 == null ?{self::Number?} null : self::ClassExtension|set#property(#t315{self::Class}, self::NumberExtension|-(self::ClassExtension|get#property(#t315{self::Class}), 1));
+  self::expect(n0, let final self::Class? #t316 = v in #t316 == null ?{self::Number?} null : self::ClassExtension|get#property(#t316{self::Class}), v == null);
 }
-static method testExplicitNullAwareIntProperties(self::IntClass* v) → dynamic {
-  core::int* n0 = 0;
-  core::int* n1 = 1;
-  core::int* n2 = 2;
-  self::expect(n0, let final self::IntClass* #t317 = v in #t317 == null ?{core::int*} null : self::IntClassExtension|get#property(#t317), v == null);
-  self::expect(n1, let final self::IntClass* #t318 = v in #t318 == null ?{core::int*} null : let final core::int* #t319 = self::IntClassExtension|get#property(#t318).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t320 = self::IntClassExtension|set#property(#t318, #t319) in #t319, v == null);
-  self::expect(n2, let final self::IntClass* #t321 = v in #t321 == null ?{core::int*} null : let final core::int* #t322 = self::IntClassExtension|get#property(#t321).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t323 = self::IntClassExtension|set#property(#t321, #t322) in #t322, v == null);
-  self::expect(n0, let final self::IntClass* #t324 = v in #t324 == null ?{core::int*} null : let final core::int* #t325 = self::IntClassExtension|get#property(#t324).{core::num::-}(n2){(core::num*) →* core::int*} in let final void #t326 = self::IntClassExtension|set#property(#t324, #t325) in #t325, v == null);
-  self::expect(n1, let final self::IntClass* #t327 = v in #t327 == null ?{core::int*} null : let final core::int* #t328 = self::IntClassExtension|get#property(#t327).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t329 = self::IntClassExtension|set#property(#t327, #t328) in #t328, v == null);
-  self::expect(n0, let final self::IntClass* #t330 = v in #t330 == null ?{core::int*} null : let final core::int* #t331 = self::IntClassExtension|get#property(#t330).{core::num::-}(n1){(core::num*) →* core::int*} in let final void #t332 = self::IntClassExtension|set#property(#t330, #t331) in #t331, v == null);
-  self::expect(n1, let final self::IntClass* #t333 = v in #t333 == null ?{core::int*} null : let final core::int* #t334 = self::IntClassExtension|get#property(#t333).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t335 = self::IntClassExtension|set#property(#t333, #t334) in #t334, v == null);
-  self::expect(n0, let final self::IntClass* #t336 = v in #t336 == null ?{core::int*} null : let final core::int* #t337 = self::IntClassExtension|get#property(#t336).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t338 = self::IntClassExtension|set#property(#t336, #t337) in #t337, v == null);
-  self::expect(n0, let final self::IntClass* #t339 = v in #t339 == null ?{core::int*} null : let final core::int* #t340 = self::IntClassExtension|get#property(#t339) in let final core::int* #t341 = let final core::int* #t342 = #t340.{core::num::+}(1){(core::num*) →* core::int*} in let final void #t343 = self::IntClassExtension|set#property(#t339, #t342) in #t342 in #t340, v == null);
-  self::expect(n1, let final self::IntClass* #t344 = v in #t344 == null ?{core::int*} null : let final core::int* #t345 = self::IntClassExtension|get#property(#t344) in let final core::int* #t346 = let final core::int* #t347 = #t345.{core::num::-}(1){(core::num*) →* core::int*} in let final void #t348 = self::IntClassExtension|set#property(#t344, #t347) in #t347 in #t345, v == null);
-  self::expect(n0, let final self::IntClass* #t349 = v in #t349 == null ?{core::int*} null : self::IntClassExtension|get#property(#t349), v == null);
-  self::expect(n0, let final self::IntClass* #t350 = v in #t350 == null ?{core::int*} null : self::IntClassExtension|get#property(#t350), v == null);
-  let final self::IntClass* #t351 = v in #t351 == null ?{core::int*} null : self::IntClassExtension|set#property(#t351, self::IntClassExtension|get#property(#t351).{core::num::+}(n1){(core::num*) →* core::int*});
-  self::expect(n1, let final self::IntClass* #t352 = v in #t352 == null ?{core::int*} null : self::IntClassExtension|get#property(#t352), v == null);
-  let final self::IntClass* #t353 = v in #t353 == null ?{core::int*} null : self::IntClassExtension|set#property(#t353, self::IntClassExtension|get#property(#t353).{core::num::+}(n1){(core::num*) →* core::int*});
-  self::expect(n2, let final self::IntClass* #t354 = v in #t354 == null ?{core::int*} null : self::IntClassExtension|get#property(#t354), v == null);
-  let final self::IntClass* #t355 = v in #t355 == null ?{core::int*} null : self::IntClassExtension|set#property(#t355, self::IntClassExtension|get#property(#t355).{core::num::-}(n2){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t356 = v in #t356 == null ?{core::int*} null : self::IntClassExtension|get#property(#t356), v == null);
-  let final self::IntClass* #t357 = v in #t357 == null ?{core::int*} null : self::IntClassExtension|set#property(#t357, self::IntClassExtension|get#property(#t357).{core::num::+}(n1){(core::num*) →* core::int*});
-  self::expect(n1, let final self::IntClass* #t358 = v in #t358 == null ?{core::int*} null : self::IntClassExtension|get#property(#t358), v == null);
-  let final self::IntClass* #t359 = v in #t359 == null ?{core::int*} null : self::IntClassExtension|set#property(#t359, self::IntClassExtension|get#property(#t359).{core::num::-}(n1){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t360 = v in #t360 == null ?{core::int*} null : self::IntClassExtension|get#property(#t360), v == null);
-  let final self::IntClass* #t361 = v in #t361 == null ?{core::int*} null : let final core::int* #t362 = self::IntClassExtension|get#property(#t361).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t363 = self::IntClassExtension|set#property(#t361, #t362) in #t362;
-  self::expect(n1, let final self::IntClass* #t364 = v in #t364 == null ?{core::int*} null : self::IntClassExtension|get#property(#t364), v == null);
-  let final self::IntClass* #t365 = v in #t365 == null ?{core::int*} null : let final core::int* #t366 = self::IntClassExtension|get#property(#t365).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t367 = self::IntClassExtension|set#property(#t365, #t366) in #t366;
-  self::expect(n0, let final self::IntClass* #t368 = v in #t368 == null ?{core::int*} null : self::IntClassExtension|get#property(#t368), v == null);
-  let final self::IntClass* #t369 = v in #t369 == null ?{core::int*} null : self::IntClassExtension|set#property(#t369, self::IntClassExtension|get#property(#t369).{core::num::+}(1){(core::num*) →* core::int*});
-  self::expect(n1, let final self::IntClass* #t370 = v in #t370 == null ?{core::int*} null : self::IntClassExtension|get#property(#t370), v == null);
-  let final self::IntClass* #t371 = v in #t371 == null ?{core::int*} null : self::IntClassExtension|set#property(#t371, self::IntClassExtension|get#property(#t371).{core::num::-}(1){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t372 = v in #t372 == null ?{core::int*} null : self::IntClassExtension|get#property(#t372), v == null);
+static method testExplicitNullAwareIntProperties(self::IntClass? v) → dynamic {
+  core::int n0 = 0;
+  core::int n1 = 1;
+  core::int n2 = 2;
+  self::expect(n0, let final self::IntClass? #t317 = v in #t317 == null ?{core::int?} null : self::IntClassExtension|get#property(#t317{self::IntClass}), v == null);
+  self::expect(n1, let final self::IntClass? #t318 = v in #t318 == null ?{core::int?} null : let final core::int #t319 = self::IntClassExtension|get#property(#t318{self::IntClass}).{core::num::+}(n1){(core::num) → core::int} in let final void #t320 = self::IntClassExtension|set#property(#t318{self::IntClass}, #t319) in #t319, v == null);
+  self::expect(n2, let final self::IntClass? #t321 = v in #t321 == null ?{core::int?} null : let final core::int #t322 = self::IntClassExtension|get#property(#t321{self::IntClass}).{core::num::+}(n1){(core::num) → core::int} in let final void #t323 = self::IntClassExtension|set#property(#t321{self::IntClass}, #t322) in #t322, v == null);
+  self::expect(n0, let final self::IntClass? #t324 = v in #t324 == null ?{core::int?} null : let final core::int #t325 = self::IntClassExtension|get#property(#t324{self::IntClass}).{core::num::-}(n2){(core::num) → core::int} in let final void #t326 = self::IntClassExtension|set#property(#t324{self::IntClass}, #t325) in #t325, v == null);
+  self::expect(n1, let final self::IntClass? #t327 = v in #t327 == null ?{core::int?} null : let final core::int #t328 = self::IntClassExtension|get#property(#t327{self::IntClass}).{core::num::+}(n1){(core::num) → core::int} in let final void #t329 = self::IntClassExtension|set#property(#t327{self::IntClass}, #t328) in #t328, v == null);
+  self::expect(n0, let final self::IntClass? #t330 = v in #t330 == null ?{core::int?} null : let final core::int #t331 = self::IntClassExtension|get#property(#t330{self::IntClass}).{core::num::-}(n1){(core::num) → core::int} in let final void #t332 = self::IntClassExtension|set#property(#t330{self::IntClass}, #t331) in #t331, v == null);
+  self::expect(n1, let final self::IntClass? #t333 = v in #t333 == null ?{core::int?} null : let final core::int #t334 = self::IntClassExtension|get#property(#t333{self::IntClass}).{core::num::+}(1){(core::num) → core::int} in let final void #t335 = self::IntClassExtension|set#property(#t333{self::IntClass}, #t334) in #t334, v == null);
+  self::expect(n0, let final self::IntClass? #t336 = v in #t336 == null ?{core::int?} null : let final core::int #t337 = self::IntClassExtension|get#property(#t336{self::IntClass}).{core::num::-}(1){(core::num) → core::int} in let final void #t338 = self::IntClassExtension|set#property(#t336{self::IntClass}, #t337) in #t337, v == null);
+  self::expect(n0, let final self::IntClass? #t339 = v in #t339 == null ?{core::int?} null : let final core::int #t340 = self::IntClassExtension|get#property(#t339{self::IntClass}) in let final core::int #t341 = let final core::int #t342 = #t340.{core::num::+}(1){(core::num) → core::int} in let final void #t343 = self::IntClassExtension|set#property(#t339{self::IntClass}, #t342) in #t342 in #t340, v == null);
+  self::expect(n1, let final self::IntClass? #t344 = v in #t344 == null ?{core::int?} null : let final core::int #t345 = self::IntClassExtension|get#property(#t344{self::IntClass}) in let final core::int #t346 = let final core::int #t347 = #t345.{core::num::-}(1){(core::num) → core::int} in let final void #t348 = self::IntClassExtension|set#property(#t344{self::IntClass}, #t347) in #t347 in #t345, v == null);
+  self::expect(n0, let final self::IntClass? #t349 = v in #t349 == null ?{core::int?} null : self::IntClassExtension|get#property(#t349{self::IntClass}), v == null);
+  self::expect(n0, let final self::IntClass? #t350 = v in #t350 == null ?{core::int?} null : self::IntClassExtension|get#property(#t350{self::IntClass}), v == null);
+  let final self::IntClass? #t351 = v in #t351 == null ?{core::int?} null : self::IntClassExtension|set#property(#t351{self::IntClass}, self::IntClassExtension|get#property(#t351{self::IntClass}).{core::num::+}(n1){(core::num) → core::int});
+  self::expect(n1, let final self::IntClass? #t352 = v in #t352 == null ?{core::int?} null : self::IntClassExtension|get#property(#t352{self::IntClass}), v == null);
+  let final self::IntClass? #t353 = v in #t353 == null ?{core::int?} null : self::IntClassExtension|set#property(#t353{self::IntClass}, self::IntClassExtension|get#property(#t353{self::IntClass}).{core::num::+}(n1){(core::num) → core::int});
+  self::expect(n2, let final self::IntClass? #t354 = v in #t354 == null ?{core::int?} null : self::IntClassExtension|get#property(#t354{self::IntClass}), v == null);
+  let final self::IntClass? #t355 = v in #t355 == null ?{core::int?} null : self::IntClassExtension|set#property(#t355{self::IntClass}, self::IntClassExtension|get#property(#t355{self::IntClass}).{core::num::-}(n2){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass? #t356 = v in #t356 == null ?{core::int?} null : self::IntClassExtension|get#property(#t356{self::IntClass}), v == null);
+  let final self::IntClass? #t357 = v in #t357 == null ?{core::int?} null : self::IntClassExtension|set#property(#t357{self::IntClass}, self::IntClassExtension|get#property(#t357{self::IntClass}).{core::num::+}(n1){(core::num) → core::int});
+  self::expect(n1, let final self::IntClass? #t358 = v in #t358 == null ?{core::int?} null : self::IntClassExtension|get#property(#t358{self::IntClass}), v == null);
+  let final self::IntClass? #t359 = v in #t359 == null ?{core::int?} null : self::IntClassExtension|set#property(#t359{self::IntClass}, self::IntClassExtension|get#property(#t359{self::IntClass}).{core::num::-}(n1){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass? #t360 = v in #t360 == null ?{core::int?} null : self::IntClassExtension|get#property(#t360{self::IntClass}), v == null);
+  let final self::IntClass? #t361 = v in #t361 == null ?{core::int?} null : let final core::int #t362 = self::IntClassExtension|get#property(#t361{self::IntClass}).{core::num::+}(1){(core::num) → core::int} in let final void #t363 = self::IntClassExtension|set#property(#t361{self::IntClass}, #t362) in #t362;
+  self::expect(n1, let final self::IntClass? #t364 = v in #t364 == null ?{core::int?} null : self::IntClassExtension|get#property(#t364{self::IntClass}), v == null);
+  let final self::IntClass? #t365 = v in #t365 == null ?{core::int?} null : let final core::int #t366 = self::IntClassExtension|get#property(#t365{self::IntClass}).{core::num::-}(1){(core::num) → core::int} in let final void #t367 = self::IntClassExtension|set#property(#t365{self::IntClass}, #t366) in #t366;
+  self::expect(n0, let final self::IntClass? #t368 = v in #t368 == null ?{core::int?} null : self::IntClassExtension|get#property(#t368{self::IntClass}), v == null);
+  let final self::IntClass? #t369 = v in #t369 == null ?{core::int?} null : self::IntClassExtension|set#property(#t369{self::IntClass}, self::IntClassExtension|get#property(#t369{self::IntClass}).{core::num::+}(1){(core::num) → core::int});
+  self::expect(n1, let final self::IntClass? #t370 = v in #t370 == null ?{core::int?} null : self::IntClassExtension|get#property(#t370{self::IntClass}), v == null);
+  let final self::IntClass? #t371 = v in #t371 == null ?{core::int?} null : self::IntClassExtension|set#property(#t371{self::IntClass}, self::IntClassExtension|get#property(#t371{self::IntClass}).{core::num::-}(1){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass? #t372 = v in #t372 == null ?{core::int?} null : self::IntClassExtension|get#property(#t372{self::IntClass}), v == null);
 }
 static method expect(dynamic expected, dynamic actual, [dynamic expectNull = #C1]) → dynamic {
-  if(expectNull as{TypeError,ForDynamic} core::bool*) {
+  if(expectNull as{TypeError,ForDynamic,ForNonNullableByDefault} core::bool) {
     expected = null;
   }
-  if(!(expected =={core::Object::==}{(core::Object*) →* core::bool*} actual)) {
+  if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual)) {
     throw "Mismatch: expected=${expected}, actual=${actual}";
   }
 }

pkg/front_end/testcases/extensions/compounds.dart.weak.modular.expect

@@ -1,117 +1,90 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 class Number extends core::Object {
-  final field core::int* value;
-  constructor •(core::int* value) → self::Number*
+  final field core::int value;
+  constructor •(core::int value) → self::Number
     : self::Number::value = value, super core::Object::•()
     ;
-  get hashCode() → core::int*
-    return this.{self::Number::value}{core::int*}.{core::num::hashCode}{core::int*};
-  operator ==(core::Object* other) → core::bool*
-    return other is self::Number* && this.{self::Number::value}{core::int*} =={core::num::==}{(core::Object*) →* core::bool*} other{self::Number*}.{self::Number::value}{core::int*};
-  method toString() → core::String*
-    return "Number(${this.{self::Number::value}{core::int*}})";
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
+  get hashCode() → core::int
+    return this.{self::Number::value}{core::int}.{core::num::hashCode}{core::int};
+  operator ==(core::Object other) → core::bool
+    return other is{ForNonNullableByDefault} self::Number && this.{self::Number::value}{core::int} =={core::num::==}{(core::Object) → core::bool} other{self::Number}.{self::Number::value}{core::int};
+  method toString() → core::String
+    return "Number(${this.{self::Number::value}{core::int}})";
 }
 class Class extends core::Object {
-  field self::Number* field;
-  constructor •(self::Number* field) → self::Class*
+  field self::Number field;
+  constructor •(self::Number field) → self::Class
     : self::Class::field = field, super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
 class IntClass extends core::Object {
-  field core::int* field;
-  constructor •(core::int* field) → self::IntClass*
+  field core::int field;
+  constructor •(core::int field) → self::IntClass
     : self::IntClass::field = field, super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension NumberExtension on self::Number* {
+extension NumberExtension on self::Number {
   operator + = self::NumberExtension|+;
   operator - = self::NumberExtension|-;
 }
-extension ClassExtension on self::Class* {
+extension ClassExtension on self::Class {
   get property = self::ClassExtension|get#property;
   method testImplicitProperties = self::ClassExtension|testImplicitProperties;
   tearoff testImplicitProperties = self::ClassExtension|get#testImplicitProperties;
   set property = self::ClassExtension|set#property;
 }
-extension IntClassExtension on self::IntClass* {
+extension IntClassExtension on self::IntClass {
   get property = self::IntClassExtension|get#property;
   method testImplicitProperties = self::IntClassExtension|testImplicitProperties;
   tearoff testImplicitProperties = self::IntClassExtension|get#testImplicitProperties;
   set property = self::IntClassExtension|set#property;
 }
-static method NumberExtension|+(lowered final self::Number* #this, core::Object* other) → self::Number* {
-  if(other is core::int*) {
-    return new self::Number::•(#this.{self::Number::value}{core::int*}.{core::num::+}(other{core::int*}){(core::num*) →* core::int*});
+static method NumberExtension|+(lowered final self::Number #this, core::Object other) → self::Number {
+  if(other is{ForNonNullableByDefault} core::int) {
+    return new self::Number::•(#this.{self::Number::value}{core::int}.{core::num::+}(other{core::int}){(core::num) → core::int});
   }
   else
-    if(other is self::Number*) {
-      return new self::Number::•(#this.{self::Number::value}{core::int*}.{core::num::+}(other{self::Number*}.{self::Number::value}{core::int*}){(core::num*) →* core::int*});
+    if(other is{ForNonNullableByDefault} self::Number) {
+      return new self::Number::•(#this.{self::Number::value}{core::int}.{core::num::+}(other{self::Number}.{self::Number::value}{core::int}){(core::num) → core::int});
     }
     else {
       throw new core::ArgumentError::•("${other}");
     }
 }
-static method NumberExtension|-(lowered final self::Number* #this, core::Object* other) → self::Number* {
-  if(other is core::int*) {
-    return new self::Number::•(#this.{self::Number::value}{core::int*}.{core::num::-}(other{core::int*}){(core::num*) →* core::int*});
+static method NumberExtension|-(lowered final self::Number #this, core::Object other) → self::Number {
+  if(other is{ForNonNullableByDefault} core::int) {
+    return new self::Number::•(#this.{self::Number::value}{core::int}.{core::num::-}(other{core::int}){(core::num) → core::int});
   }
   else
-    if(other is self::Number*) {
-      return new self::Number::•(#this.{self::Number::value}{core::int*}.{core::num::-}(other{self::Number*}.{self::Number::value}{core::int*}){(core::num*) →* core::int*});
+    if(other is{ForNonNullableByDefault} self::Number) {
+      return new self::Number::•(#this.{self::Number::value}{core::int}.{core::num::-}(other{self::Number}.{self::Number::value}{core::int}){(core::num) → core::int});
     }
     else {
       throw new core::ArgumentError::•("${other}");
     }
 }
-static method ClassExtension|get#property(lowered final self::Class* #this) → self::Number*
-  return #this.{self::Class::field}{self::Number*};
-static method ClassExtension|set#property(lowered final self::Class* #this, self::Number* value) → void {
+static method ClassExtension|get#property(lowered final self::Class #this) → self::Number
+  return #this.{self::Class::field}{self::Number};
+static method ClassExtension|set#property(lowered final self::Class #this, self::Number value) → void {
   #this.{self::Class::field} = value;
 }
-static method ClassExtension|testImplicitProperties(lowered final self::Class* #this) → dynamic {
-  self::Number* n0 = new self::Number::•(0);
-  self::Number* n1 = new self::Number::•(1);
-  self::Number* n2 = new self::Number::•(2);
+static method ClassExtension|testImplicitProperties(lowered final self::Class #this) → dynamic {
+  self::Number n0 = new self::Number::•(0);
+  self::Number n1 = new self::Number::•(1);
+  self::Number n2 = new self::Number::•(2);
   self::expect(n0, self::ClassExtension|get#property(#this));
-  self::expect(n1, let final self::Number* #t1 = self::NumberExtension|+(self::ClassExtension|get#property(#this), n1) in let final void #t2 = self::ClassExtension|set#property(#this, #t1) in #t1);
-  self::expect(n2, let final self::Number* #t3 = self::NumberExtension|+(self::ClassExtension|get#property(#this), n1) in let final void #t4 = self::ClassExtension|set#property(#this, #t3) in #t3);
-  self::expect(n0, let final self::Number* #t5 = self::NumberExtension|-(self::ClassExtension|get#property(#this), n2) in let final void #t6 = self::ClassExtension|set#property(#this, #t5) in #t5);
-  self::expect(n1, let final self::Number* #t7 = self::NumberExtension|+(self::ClassExtension|get#property(#this), n1) in let final void #t8 = self::ClassExtension|set#property(#this, #t7) in #t7);
-  self::expect(n0, let final self::Number* #t9 = self::NumberExtension|-(self::ClassExtension|get#property(#this), n1) in let final void #t10 = self::ClassExtension|set#property(#this, #t9) in #t9);
-  self::expect(n1, let final self::Number* #t11 = self::NumberExtension|+(self::ClassExtension|get#property(#this), 1) in let final void #t12 = self::ClassExtension|set#property(#this, #t11) in #t11);
-  self::expect(n0, let final self::Number* #t13 = self::NumberExtension|-(self::ClassExtension|get#property(#this), 1) in let final void #t14 = self::ClassExtension|set#property(#this, #t13) in #t13);
-  self::expect(n0, let final self::Number* #t15 = self::ClassExtension|get#property(#this) in let final self::Number* #t16 = self::ClassExtension|set#property(#this, self::NumberExtension|+(#t15, 1)) in #t15);
-  self::expect(n1, let final self::Number* #t17 = self::ClassExtension|get#property(#this) in let final self::Number* #t18 = self::ClassExtension|set#property(#this, self::NumberExtension|-(#t17, 1)) in #t17);
+  self::expect(n1, let final self::Number #t1 = self::NumberExtension|+(self::ClassExtension|get#property(#this), n1) in let final void #t2 = self::ClassExtension|set#property(#this, #t1) in #t1);
+  self::expect(n2, let final self::Number #t3 = self::NumberExtension|+(self::ClassExtension|get#property(#this), n1) in let final void #t4 = self::ClassExtension|set#property(#this, #t3) in #t3);
+  self::expect(n0, let final self::Number #t5 = self::NumberExtension|-(self::ClassExtension|get#property(#this), n2) in let final void #t6 = self::ClassExtension|set#property(#this, #t5) in #t5);
+  self::expect(n1, let final self::Number #t7 = self::NumberExtension|+(self::ClassExtension|get#property(#this), n1) in let final void #t8 = self::ClassExtension|set#property(#this, #t7) in #t7);
+  self::expect(n0, let final self::Number #t9 = self::NumberExtension|-(self::ClassExtension|get#property(#this), n1) in let final void #t10 = self::ClassExtension|set#property(#this, #t9) in #t9);
+  self::expect(n1, let final self::Number #t11 = self::NumberExtension|+(self::ClassExtension|get#property(#this), 1) in let final void #t12 = self::ClassExtension|set#property(#this, #t11) in #t11);
+  self::expect(n0, let final self::Number #t13 = self::NumberExtension|-(self::ClassExtension|get#property(#this), 1) in let final void #t14 = self::ClassExtension|set#property(#this, #t13) in #t13);
+  self::expect(n0, let final self::Number #t15 = self::ClassExtension|get#property(#this) in let final self::Number #t16 = self::ClassExtension|set#property(#this, self::NumberExtension|+(#t15, 1)) in #t15);
+  self::expect(n1, let final self::Number #t17 = self::ClassExtension|get#property(#this) in let final self::Number #t18 = self::ClassExtension|set#property(#this, self::NumberExtension|-(#t17, 1)) in #t17);
   self::expect(n0, self::ClassExtension|get#property(#this));
   self::expect(n0, self::ClassExtension|get#property(#this));
   self::ClassExtension|set#property(#this, self::NumberExtension|+(self::ClassExtension|get#property(#this), n1));
@@ -124,58 +97,58 @@ static method ClassExtension|testImplicitProperties(lowered final self::Class* #
   self::expect(n1, self::ClassExtension|get#property(#this));
   self::ClassExtension|set#property(#this, self::NumberExtension|-(self::ClassExtension|get#property(#this), n1));
   self::expect(n0, self::ClassExtension|get#property(#this));
-  let final self::Number* #t19 = self::NumberExtension|+(self::ClassExtension|get#property(#this), 1) in let final void #t20 = self::ClassExtension|set#property(#this, #t19) in #t19;
+  let final self::Number #t19 = self::NumberExtension|+(self::ClassExtension|get#property(#this), 1) in let final void #t20 = self::ClassExtension|set#property(#this, #t19) in #t19;
   self::expect(n1, self::ClassExtension|get#property(#this));
-  let final self::Number* #t21 = self::NumberExtension|-(self::ClassExtension|get#property(#this), 1) in let final void #t22 = self::ClassExtension|set#property(#this, #t21) in #t21;
+  let final self::Number #t21 = self::NumberExtension|-(self::ClassExtension|get#property(#this), 1) in let final void #t22 = self::ClassExtension|set#property(#this, #t21) in #t21;
   self::expect(n0, self::ClassExtension|get#property(#this));
   self::ClassExtension|set#property(#this, self::NumberExtension|+(self::ClassExtension|get#property(#this), 1));
   self::expect(n1, self::ClassExtension|get#property(#this));
   self::ClassExtension|set#property(#this, self::NumberExtension|-(self::ClassExtension|get#property(#this), 1));
   self::expect(n0, self::ClassExtension|get#property(#this));
 }
-static method ClassExtension|get#testImplicitProperties(lowered final self::Class* #this) → () →* dynamic
+static method ClassExtension|get#testImplicitProperties(lowered final self::Class #this) → () → dynamic
   return () → dynamic => self::ClassExtension|testImplicitProperties(#this);
-static method IntClassExtension|get#property(lowered final self::IntClass* #this) → core::int*
-  return #this.{self::IntClass::field}{core::int*};
-static method IntClassExtension|set#property(lowered final self::IntClass* #this, core::int* value) → void {
+static method IntClassExtension|get#property(lowered final self::IntClass #this) → core::int
+  return #this.{self::IntClass::field}{core::int};
+static method IntClassExtension|set#property(lowered final self::IntClass #this, core::int value) → void {
   #this.{self::IntClass::field} = value;
 }
-static method IntClassExtension|testImplicitProperties(lowered final self::IntClass* #this) → dynamic {
-  core::int* n0 = 0;
-  core::int* n1 = 1;
-  core::int* n2 = 2;
+static method IntClassExtension|testImplicitProperties(lowered final self::IntClass #this) → dynamic {
+  core::int n0 = 0;
+  core::int n1 = 1;
+  core::int n2 = 2;
   self::expect(n0, self::IntClassExtension|get#property(#this));
-  self::expect(n1, let final core::int* #t23 = self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t24 = self::IntClassExtension|set#property(#this, #t23) in #t23);
-  self::expect(n2, let final core::int* #t25 = self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t26 = self::IntClassExtension|set#property(#this, #t25) in #t25);
-  self::expect(n0, let final core::int* #t27 = self::IntClassExtension|get#property(#this).{core::num::-}(n2){(core::num*) →* core::int*} in let final void #t28 = self::IntClassExtension|set#property(#this, #t27) in #t27);
-  self::expect(n1, let final core::int* #t29 = self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t30 = self::IntClassExtension|set#property(#this, #t29) in #t29);
-  self::expect(n0, let final core::int* #t31 = self::IntClassExtension|get#property(#this).{core::num::-}(n1){(core::num*) →* core::int*} in let final void #t32 = self::IntClassExtension|set#property(#this, #t31) in #t31);
-  self::expect(n1, let final core::int* #t33 = self::IntClassExtension|get#property(#this).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t34 = self::IntClassExtension|set#property(#this, #t33) in #t33);
-  self::expect(n0, let final core::int* #t35 = self::IntClassExtension|get#property(#this).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t36 = self::IntClassExtension|set#property(#this, #t35) in #t35);
-  self::expect(n0, let final core::int* #t37 = self::IntClassExtension|get#property(#this) in let final core::int* #t38 = self::IntClassExtension|set#property(#this, #t37.{core::num::+}(1){(core::num*) →* core::int*}) in #t37);
-  self::expect(n1, let final core::int* #t39 = self::IntClassExtension|get#property(#this) in let final core::int* #t40 = self::IntClassExtension|set#property(#this, #t39.{core::num::-}(1){(core::num*) →* core::int*}) in #t39);
+  self::expect(n1, let final core::int #t23 = self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num) → core::int} in let final void #t24 = self::IntClassExtension|set#property(#this, #t23) in #t23);
+  self::expect(n2, let final core::int #t25 = self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num) → core::int} in let final void #t26 = self::IntClassExtension|set#property(#this, #t25) in #t25);
+  self::expect(n0, let final core::int #t27 = self::IntClassExtension|get#property(#this).{core::num::-}(n2){(core::num) → core::int} in let final void #t28 = self::IntClassExtension|set#property(#this, #t27) in #t27);
+  self::expect(n1, let final core::int #t29 = self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num) → core::int} in let final void #t30 = self::IntClassExtension|set#property(#this, #t29) in #t29);
+  self::expect(n0, let final core::int #t31 = self::IntClassExtension|get#property(#this).{core::num::-}(n1){(core::num) → core::int} in let final void #t32 = self::IntClassExtension|set#property(#this, #t31) in #t31);
+  self::expect(n1, let final core::int #t33 = self::IntClassExtension|get#property(#this).{core::num::+}(1){(core::num) → core::int} in let final void #t34 = self::IntClassExtension|set#property(#this, #t33) in #t33);
+  self::expect(n0, let final core::int #t35 = self::IntClassExtension|get#property(#this).{core::num::-}(1){(core::num) → core::int} in let final void #t36 = self::IntClassExtension|set#property(#this, #t35) in #t35);
+  self::expect(n0, let final core::int #t37 = self::IntClassExtension|get#property(#this) in let final core::int #t38 = self::IntClassExtension|set#property(#this, #t37.{core::num::+}(1){(core::num) → core::int}) in #t37);
+  self::expect(n1, let final core::int #t39 = self::IntClassExtension|get#property(#this) in let final core::int #t40 = self::IntClassExtension|set#property(#this, #t39.{core::num::-}(1){(core::num) → core::int}) in #t39);
   self::expect(n0, self::IntClassExtension|get#property(#this));
   self::expect(n0, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n2, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::-}(n2){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::-}(n2){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::-}(n1){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::-}(n1){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(#this));
-  let final core::int* #t41 = self::IntClassExtension|get#property(#this).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t42 = self::IntClassExtension|set#property(#this, #t41) in #t41;
+  let final core::int #t41 = self::IntClassExtension|get#property(#this).{core::num::+}(1){(core::num) → core::int} in let final void #t42 = self::IntClassExtension|set#property(#this, #t41) in #t41;
   self::expect(n1, self::IntClassExtension|get#property(#this));
-  let final core::int* #t43 = self::IntClassExtension|get#property(#this).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t44 = self::IntClassExtension|set#property(#this, #t43) in #t43;
+  let final core::int #t43 = self::IntClassExtension|get#property(#this).{core::num::-}(1){(core::num) → core::int} in let final void #t44 = self::IntClassExtension|set#property(#this, #t43) in #t43;
   self::expect(n0, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(1){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::-}(1){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::-}(1){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(#this));
 }
-static method IntClassExtension|get#testImplicitProperties(lowered final self::IntClass* #this) → () →* dynamic
+static method IntClassExtension|get#testImplicitProperties(lowered final self::IntClass #this) → () → dynamic
   return () → dynamic => self::IntClassExtension|testImplicitProperties(#this);
 static method main() → dynamic {
   self::testLocals();
@@ -191,10 +164,10 @@ static method main() → dynamic {
   self::IntClassExtension|testImplicitProperties(new self::IntClass::•(0));
 }
 static method testLocals() → dynamic {
-  self::Number* n0 = new self::Number::•(0);
-  self::Number* n1 = new self::Number::•(1);
-  self::Number* n2 = new self::Number::•(2);
-  self::Number* v = n0;
+  self::Number n0 = new self::Number::•(0);
+  self::Number n1 = new self::Number::•(1);
+  self::Number n2 = new self::Number::•(2);
+  self::Number v = n0;
   self::expect(n0, v);
   self::expect(n1, v = self::NumberExtension|+(v, n1));
   self::expect(n2, v = self::NumberExtension|+(v, n1));
@@ -203,8 +176,8 @@ static method testLocals() → dynamic {
   self::expect(n0, v = self::NumberExtension|-(v, n1));
   self::expect(n1, v = self::NumberExtension|+(v, 1));
   self::expect(n0, v = self::NumberExtension|-(v, 1));
-  self::expect(n0, let final self::Number* #t45 = v in let final self::Number* #t46 = v = self::NumberExtension|+(#t45, 1) in #t45);
-  self::expect(n1, let final self::Number* #t47 = v in let final self::Number* #t48 = v = self::NumberExtension|-(#t47, 1) in #t47);
+  self::expect(n0, let final self::Number #t45 = v in let final self::Number #t46 = v = self::NumberExtension|+(#t45, 1) in #t45);
+  self::expect(n1, let final self::Number #t47 = v in let final self::Number #t48 = v = self::NumberExtension|-(#t47, 1) in #t47);
   self::expect(n0, v);
   self::expect(n0, v);
   v = self::NumberExtension|+(v, n1);
@@ -227,284 +200,284 @@ static method testLocals() → dynamic {
   self::expect(n0, v);
 }
 static method testProperties() → dynamic {
-  self::Number* n0 = new self::Number::•(0);
-  self::Number* n1 = new self::Number::•(1);
-  self::Number* n2 = new self::Number::•(2);
-  self::Class* v = new self::Class::•(n0);
-  self::expect(n0, v.{self::Class::field}{self::Number*});
-  self::expect(n1, let final self::Class* #t49 = v in #t49.{self::Class::field} = self::NumberExtension|+(#t49.{self::Class::field}{self::Number*}, n1));
-  self::expect(n2, let final self::Class* #t50 = v in #t50.{self::Class::field} = self::NumberExtension|+(#t50.{self::Class::field}{self::Number*}, n1));
-  self::expect(n0, let final self::Class* #t51 = v in #t51.{self::Class::field} = self::NumberExtension|-(#t51.{self::Class::field}{self::Number*}, n2));
-  self::expect(n1, let final self::Class* #t52 = v in #t52.{self::Class::field} = self::NumberExtension|+(#t52.{self::Class::field}{self::Number*}, n1));
-  self::expect(n0, let final self::Class* #t53 = v in #t53.{self::Class::field} = self::NumberExtension|-(#t53.{self::Class::field}{self::Number*}, n1));
-  self::expect(n1, let final self::Class* #t54 = v in #t54.{self::Class::field} = self::NumberExtension|+(#t54.{self::Class::field}{self::Number*}, 1));
-  self::expect(n0, let final self::Class* #t55 = v in #t55.{self::Class::field} = self::NumberExtension|-(#t55.{self::Class::field}{self::Number*}, 1));
-  self::expect(n0, let final self::Class* #t56 = v in let final self::Number* #t57 = #t56.{self::Class::field}{self::Number*} in let final self::Number* #t58 = #t56.{self::Class::field} = self::NumberExtension|+(#t57, 1) in #t57);
-  self::expect(n1, let final self::Class* #t59 = v in let final self::Number* #t60 = #t59.{self::Class::field}{self::Number*} in let final self::Number* #t61 = #t59.{self::Class::field} = self::NumberExtension|-(#t60, 1) in #t60);
-  self::expect(n0, v.{self::Class::field}{self::Number*});
-  self::expect(n0, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t62 = v in #t62.{self::Class::field} = self::NumberExtension|+(#t62.{self::Class::field}{self::Number*}, n1);
-  self::expect(n1, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t63 = v in #t63.{self::Class::field} = self::NumberExtension|+(#t63.{self::Class::field}{self::Number*}, n1);
-  self::expect(n2, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t64 = v in #t64.{self::Class::field} = self::NumberExtension|-(#t64.{self::Class::field}{self::Number*}, n2);
-  self::expect(n0, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t65 = v in #t65.{self::Class::field} = self::NumberExtension|+(#t65.{self::Class::field}{self::Number*}, n1);
-  self::expect(n1, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t66 = v in #t66.{self::Class::field} = self::NumberExtension|-(#t66.{self::Class::field}{self::Number*}, n1);
-  self::expect(n0, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t67 = v in #t67.{self::Class::field} = self::NumberExtension|+(#t67.{self::Class::field}{self::Number*}, 1);
-  self::expect(n1, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t68 = v in #t68.{self::Class::field} = self::NumberExtension|-(#t68.{self::Class::field}{self::Number*}, 1);
-  self::expect(n0, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t69 = v in #t69.{self::Class::field} = self::NumberExtension|+(#t69.{self::Class::field}{self::Number*}, 1);
-  self::expect(n1, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t70 = v in #t70.{self::Class::field} = self::NumberExtension|-(#t70.{self::Class::field}{self::Number*}, 1);
-  self::expect(n0, v.{self::Class::field}{self::Number*});
+  self::Number n0 = new self::Number::•(0);
+  self::Number n1 = new self::Number::•(1);
+  self::Number n2 = new self::Number::•(2);
+  self::Class v = new self::Class::•(n0);
+  self::expect(n0, v.{self::Class::field}{self::Number});
+  self::expect(n1, let final self::Class #t49 = v in #t49.{self::Class::field} = self::NumberExtension|+(#t49.{self::Class::field}{self::Number}, n1));
+  self::expect(n2, let final self::Class #t50 = v in #t50.{self::Class::field} = self::NumberExtension|+(#t50.{self::Class::field}{self::Number}, n1));
+  self::expect(n0, let final self::Class #t51 = v in #t51.{self::Class::field} = self::NumberExtension|-(#t51.{self::Class::field}{self::Number}, n2));
+  self::expect(n1, let final self::Class #t52 = v in #t52.{self::Class::field} = self::NumberExtension|+(#t52.{self::Class::field}{self::Number}, n1));
+  self::expect(n0, let final self::Class #t53 = v in #t53.{self::Class::field} = self::NumberExtension|-(#t53.{self::Class::field}{self::Number}, n1));
+  self::expect(n1, let final self::Class #t54 = v in #t54.{self::Class::field} = self::NumberExtension|+(#t54.{self::Class::field}{self::Number}, 1));
+  self::expect(n0, let final self::Class #t55 = v in #t55.{self::Class::field} = self::NumberExtension|-(#t55.{self::Class::field}{self::Number}, 1));
+  self::expect(n0, let final self::Class #t56 = v in let final self::Number #t57 = #t56.{self::Class::field}{self::Number} in let final self::Number #t58 = #t56.{self::Class::field} = self::NumberExtension|+(#t57, 1) in #t57);
+  self::expect(n1, let final self::Class #t59 = v in let final self::Number #t60 = #t59.{self::Class::field}{self::Number} in let final self::Number #t61 = #t59.{self::Class::field} = self::NumberExtension|-(#t60, 1) in #t60);
+  self::expect(n0, v.{self::Class::field}{self::Number});
+  self::expect(n0, v.{self::Class::field}{self::Number});
+  let final self::Class #t62 = v in #t62.{self::Class::field} = self::NumberExtension|+(#t62.{self::Class::field}{self::Number}, n1);
+  self::expect(n1, v.{self::Class::field}{self::Number});
+  let final self::Class #t63 = v in #t63.{self::Class::field} = self::NumberExtension|+(#t63.{self::Class::field}{self::Number}, n1);
+  self::expect(n2, v.{self::Class::field}{self::Number});
+  let final self::Class #t64 = v in #t64.{self::Class::field} = self::NumberExtension|-(#t64.{self::Class::field}{self::Number}, n2);
+  self::expect(n0, v.{self::Class::field}{self::Number});
+  let final self::Class #t65 = v in #t65.{self::Class::field} = self::NumberExtension|+(#t65.{self::Class::field}{self::Number}, n1);
+  self::expect(n1, v.{self::Class::field}{self::Number});
+  let final self::Class #t66 = v in #t66.{self::Class::field} = self::NumberExtension|-(#t66.{self::Class::field}{self::Number}, n1);
+  self::expect(n0, v.{self::Class::field}{self::Number});
+  let final self::Class #t67 = v in #t67.{self::Class::field} = self::NumberExtension|+(#t67.{self::Class::field}{self::Number}, 1);
+  self::expect(n1, v.{self::Class::field}{self::Number});
+  let final self::Class #t68 = v in #t68.{self::Class::field} = self::NumberExtension|-(#t68.{self::Class::field}{self::Number}, 1);
+  self::expect(n0, v.{self::Class::field}{self::Number});
+  let final self::Class #t69 = v in #t69.{self::Class::field} = self::NumberExtension|+(#t69.{self::Class::field}{self::Number}, 1);
+  self::expect(n1, v.{self::Class::field}{self::Number});
+  let final self::Class #t70 = v in #t70.{self::Class::field} = self::NumberExtension|-(#t70.{self::Class::field}{self::Number}, 1);
+  self::expect(n0, v.{self::Class::field}{self::Number});
   self::expect(n0, self::ClassExtension|get#property(v));
-  self::expect(n1, let final self::Class* #t71 = v in let final self::Number* #t72 = self::NumberExtension|+(self::ClassExtension|get#property(#t71), n1) in let final void #t73 = self::ClassExtension|set#property(#t71, #t72) in #t72);
-  self::expect(n2, let final self::Class* #t74 = v in let final self::Number* #t75 = self::NumberExtension|+(self::ClassExtension|get#property(#t74), n1) in let final void #t76 = self::ClassExtension|set#property(#t74, #t75) in #t75);
-  self::expect(n0, let final self::Class* #t77 = v in let final self::Number* #t78 = self::NumberExtension|-(self::ClassExtension|get#property(#t77), n2) in let final void #t79 = self::ClassExtension|set#property(#t77, #t78) in #t78);
-  self::expect(n1, let final self::Class* #t80 = v in let final self::Number* #t81 = self::NumberExtension|+(self::ClassExtension|get#property(#t80), n1) in let final void #t82 = self::ClassExtension|set#property(#t80, #t81) in #t81);
-  self::expect(n0, let final self::Class* #t83 = v in let final self::Number* #t84 = self::NumberExtension|-(self::ClassExtension|get#property(#t83), n1) in let final void #t85 = self::ClassExtension|set#property(#t83, #t84) in #t84);
-  self::expect(n1, let final self::Class* #t86 = v in let final self::Number* #t87 = self::NumberExtension|+(self::ClassExtension|get#property(#t86), 1) in let final void #t88 = self::ClassExtension|set#property(#t86, #t87) in #t87);
-  self::expect(n0, let final self::Class* #t89 = v in let final self::Number* #t90 = self::NumberExtension|-(self::ClassExtension|get#property(#t89), 1) in let final void #t91 = self::ClassExtension|set#property(#t89, #t90) in #t90);
-  self::expect(n0, let final self::Class* #t92 = v in let final self::Number* #t93 = self::ClassExtension|get#property(#t92) in let final self::Number* #t94 = self::ClassExtension|set#property(#t92, self::NumberExtension|+(#t93, 1)) in #t93);
-  self::expect(n1, let final self::Class* #t95 = v in let final self::Number* #t96 = self::ClassExtension|get#property(#t95) in let final self::Number* #t97 = self::ClassExtension|set#property(#t95, self::NumberExtension|-(#t96, 1)) in #t96);
+  self::expect(n1, let final self::Class #t71 = v in let final self::Number #t72 = self::NumberExtension|+(self::ClassExtension|get#property(#t71), n1) in let final void #t73 = self::ClassExtension|set#property(#t71, #t72) in #t72);
+  self::expect(n2, let final self::Class #t74 = v in let final self::Number #t75 = self::NumberExtension|+(self::ClassExtension|get#property(#t74), n1) in let final void #t76 = self::ClassExtension|set#property(#t74, #t75) in #t75);
+  self::expect(n0, let final self::Class #t77 = v in let final self::Number #t78 = self::NumberExtension|-(self::ClassExtension|get#property(#t77), n2) in let final void #t79 = self::ClassExtension|set#property(#t77, #t78) in #t78);
+  self::expect(n1, let final self::Class #t80 = v in let final self::Number #t81 = self::NumberExtension|+(self::ClassExtension|get#property(#t80), n1) in let final void #t82 = self::ClassExtension|set#property(#t80, #t81) in #t81);
+  self::expect(n0, let final self::Class #t83 = v in let final self::Number #t84 = self::NumberExtension|-(self::ClassExtension|get#property(#t83), n1) in let final void #t85 = self::ClassExtension|set#property(#t83, #t84) in #t84);
+  self::expect(n1, let final self::Class #t86 = v in let final self::Number #t87 = self::NumberExtension|+(self::ClassExtension|get#property(#t86), 1) in let final void #t88 = self::ClassExtension|set#property(#t86, #t87) in #t87);
+  self::expect(n0, let final self::Class #t89 = v in let final self::Number #t90 = self::NumberExtension|-(self::ClassExtension|get#property(#t89), 1) in let final void #t91 = self::ClassExtension|set#property(#t89, #t90) in #t90);
+  self::expect(n0, let final self::Class #t92 = v in let final self::Number #t93 = self::ClassExtension|get#property(#t92) in let final self::Number #t94 = self::ClassExtension|set#property(#t92, self::NumberExtension|+(#t93, 1)) in #t93);
+  self::expect(n1, let final self::Class #t95 = v in let final self::Number #t96 = self::ClassExtension|get#property(#t95) in let final self::Number #t97 = self::ClassExtension|set#property(#t95, self::NumberExtension|-(#t96, 1)) in #t96);
   self::expect(n0, self::ClassExtension|get#property(v));
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t98 = v in self::ClassExtension|set#property(#t98, self::NumberExtension|+(self::ClassExtension|get#property(#t98), n1));
+  let final self::Class #t98 = v in self::ClassExtension|set#property(#t98, self::NumberExtension|+(self::ClassExtension|get#property(#t98), n1));
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t99 = v in self::ClassExtension|set#property(#t99, self::NumberExtension|+(self::ClassExtension|get#property(#t99), n1));
+  let final self::Class #t99 = v in self::ClassExtension|set#property(#t99, self::NumberExtension|+(self::ClassExtension|get#property(#t99), n1));
   self::expect(n2, self::ClassExtension|get#property(v));
-  let final self::Class* #t100 = v in self::ClassExtension|set#property(#t100, self::NumberExtension|-(self::ClassExtension|get#property(#t100), n2));
+  let final self::Class #t100 = v in self::ClassExtension|set#property(#t100, self::NumberExtension|-(self::ClassExtension|get#property(#t100), n2));
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t101 = v in self::ClassExtension|set#property(#t101, self::NumberExtension|+(self::ClassExtension|get#property(#t101), n1));
+  let final self::Class #t101 = v in self::ClassExtension|set#property(#t101, self::NumberExtension|+(self::ClassExtension|get#property(#t101), n1));
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t102 = v in self::ClassExtension|set#property(#t102, self::NumberExtension|-(self::ClassExtension|get#property(#t102), n1));
+  let final self::Class #t102 = v in self::ClassExtension|set#property(#t102, self::NumberExtension|-(self::ClassExtension|get#property(#t102), n1));
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t103 = v in let final self::Number* #t104 = self::NumberExtension|+(self::ClassExtension|get#property(#t103), 1) in let final void #t105 = self::ClassExtension|set#property(#t103, #t104) in #t104;
+  let final self::Class #t103 = v in let final self::Number #t104 = self::NumberExtension|+(self::ClassExtension|get#property(#t103), 1) in let final void #t105 = self::ClassExtension|set#property(#t103, #t104) in #t104;
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t106 = v in let final self::Number* #t107 = self::NumberExtension|-(self::ClassExtension|get#property(#t106), 1) in let final void #t108 = self::ClassExtension|set#property(#t106, #t107) in #t107;
+  let final self::Class #t106 = v in let final self::Number #t107 = self::NumberExtension|-(self::ClassExtension|get#property(#t106), 1) in let final void #t108 = self::ClassExtension|set#property(#t106, #t107) in #t107;
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t109 = v in self::ClassExtension|set#property(#t109, self::NumberExtension|+(self::ClassExtension|get#property(#t109), 1));
+  let final self::Class #t109 = v in self::ClassExtension|set#property(#t109, self::NumberExtension|+(self::ClassExtension|get#property(#t109), 1));
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t110 = v in self::ClassExtension|set#property(#t110, self::NumberExtension|-(self::ClassExtension|get#property(#t110), 1));
+  let final self::Class #t110 = v in self::ClassExtension|set#property(#t110, self::NumberExtension|-(self::ClassExtension|get#property(#t110), 1));
   self::expect(n0, self::ClassExtension|get#property(v));
 }
 static method testIntProperties() → dynamic {
-  core::int* n0 = 0;
-  core::int* n1 = 1;
-  core::int* n2 = 2;
-  self::IntClass* v = new self::IntClass::•(n0);
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
-  self::expect(n1, let final self::IntClass* #t111 = v in #t111.{self::IntClass::field} = #t111.{self::IntClass::field}{core::int*}.{core::num::+}(n1){(core::num*) →* core::int*});
-  self::expect(n2, let final self::IntClass* #t112 = v in #t112.{self::IntClass::field} = #t112.{self::IntClass::field}{core::int*}.{core::num::+}(n1){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t113 = v in #t113.{self::IntClass::field} = #t113.{self::IntClass::field}{core::int*}.{core::num::-}(n2){(core::num*) →* core::int*});
-  self::expect(n1, let final self::IntClass* #t114 = v in #t114.{self::IntClass::field} = #t114.{self::IntClass::field}{core::int*}.{core::num::+}(n1){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t115 = v in #t115.{self::IntClass::field} = #t115.{self::IntClass::field}{core::int*}.{core::num::-}(n1){(core::num*) →* core::int*});
-  self::expect(n1, let final self::IntClass* #t116 = v in #t116.{self::IntClass::field} = #t116.{self::IntClass::field}{core::int*}.{core::num::+}(1){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t117 = v in #t117.{self::IntClass::field} = #t117.{self::IntClass::field}{core::int*}.{core::num::-}(1){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t118 = v in let final core::int* #t119 = #t118.{self::IntClass::field}{core::int*} in let final core::int* #t120 = #t118.{self::IntClass::field} = #t119.{core::num::+}(1){(core::num*) →* core::int*} in #t119);
-  self::expect(n1, let final self::IntClass* #t121 = v in let final core::int* #t122 = #t121.{self::IntClass::field}{core::int*} in let final core::int* #t123 = #t121.{self::IntClass::field} = #t122.{core::num::-}(1){(core::num*) →* core::int*} in #t122);
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t124 = v in #t124.{self::IntClass::field} = #t124.{self::IntClass::field}{core::int*}.{core::num::+}(n1){(core::num*) →* core::int*};
-  self::expect(n1, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t125 = v in #t125.{self::IntClass::field} = #t125.{self::IntClass::field}{core::int*}.{core::num::+}(n1){(core::num*) →* core::int*};
-  self::expect(n2, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t126 = v in #t126.{self::IntClass::field} = #t126.{self::IntClass::field}{core::int*}.{core::num::-}(n2){(core::num*) →* core::int*};
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t127 = v in #t127.{self::IntClass::field} = #t127.{self::IntClass::field}{core::int*}.{core::num::+}(n1){(core::num*) →* core::int*};
-  self::expect(n1, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t128 = v in #t128.{self::IntClass::field} = #t128.{self::IntClass::field}{core::int*}.{core::num::-}(n1){(core::num*) →* core::int*};
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t129 = v in #t129.{self::IntClass::field} = #t129.{self::IntClass::field}{core::int*}.{core::num::+}(1){(core::num*) →* core::int*};
-  self::expect(n1, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t130 = v in #t130.{self::IntClass::field} = #t130.{self::IntClass::field}{core::int*}.{core::num::-}(1){(core::num*) →* core::int*};
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t131 = v in #t131.{self::IntClass::field} = #t131.{self::IntClass::field}{core::int*}.{core::num::+}(1){(core::num*) →* core::int*};
-  self::expect(n1, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t132 = v in #t132.{self::IntClass::field} = #t132.{self::IntClass::field}{core::int*}.{core::num::-}(1){(core::num*) →* core::int*};
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
+  core::int n0 = 0;
+  core::int n1 = 1;
+  core::int n2 = 2;
+  self::IntClass v = new self::IntClass::•(n0);
+  self::expect(n0, v.{self::IntClass::field}{core::int});
+  self::expect(n1, let final self::IntClass #t111 = v in #t111.{self::IntClass::field} = #t111.{self::IntClass::field}{core::int}.{core::num::+}(n1){(core::num) → core::int});
+  self::expect(n2, let final self::IntClass #t112 = v in #t112.{self::IntClass::field} = #t112.{self::IntClass::field}{core::int}.{core::num::+}(n1){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass #t113 = v in #t113.{self::IntClass::field} = #t113.{self::IntClass::field}{core::int}.{core::num::-}(n2){(core::num) → core::int});
+  self::expect(n1, let final self::IntClass #t114 = v in #t114.{self::IntClass::field} = #t114.{self::IntClass::field}{core::int}.{core::num::+}(n1){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass #t115 = v in #t115.{self::IntClass::field} = #t115.{self::IntClass::field}{core::int}.{core::num::-}(n1){(core::num) → core::int});
+  self::expect(n1, let final self::IntClass #t116 = v in #t116.{self::IntClass::field} = #t116.{self::IntClass::field}{core::int}.{core::num::+}(1){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass #t117 = v in #t117.{self::IntClass::field} = #t117.{self::IntClass::field}{core::int}.{core::num::-}(1){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass #t118 = v in let final core::int #t119 = #t118.{self::IntClass::field}{core::int} in let final core::int #t120 = #t118.{self::IntClass::field} = #t119.{core::num::+}(1){(core::num) → core::int} in #t119);
+  self::expect(n1, let final self::IntClass #t121 = v in let final core::int #t122 = #t121.{self::IntClass::field}{core::int} in let final core::int #t123 = #t121.{self::IntClass::field} = #t122.{core::num::-}(1){(core::num) → core::int} in #t122);
+  self::expect(n0, v.{self::IntClass::field}{core::int});
+  self::expect(n0, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t124 = v in #t124.{self::IntClass::field} = #t124.{self::IntClass::field}{core::int}.{core::num::+}(n1){(core::num) → core::int};
+  self::expect(n1, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t125 = v in #t125.{self::IntClass::field} = #t125.{self::IntClass::field}{core::int}.{core::num::+}(n1){(core::num) → core::int};
+  self::expect(n2, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t126 = v in #t126.{self::IntClass::field} = #t126.{self::IntClass::field}{core::int}.{core::num::-}(n2){(core::num) → core::int};
+  self::expect(n0, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t127 = v in #t127.{self::IntClass::field} = #t127.{self::IntClass::field}{core::int}.{core::num::+}(n1){(core::num) → core::int};
+  self::expect(n1, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t128 = v in #t128.{self::IntClass::field} = #t128.{self::IntClass::field}{core::int}.{core::num::-}(n1){(core::num) → core::int};
+  self::expect(n0, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t129 = v in #t129.{self::IntClass::field} = #t129.{self::IntClass::field}{core::int}.{core::num::+}(1){(core::num) → core::int};
+  self::expect(n1, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t130 = v in #t130.{self::IntClass::field} = #t130.{self::IntClass::field}{core::int}.{core::num::-}(1){(core::num) → core::int};
+  self::expect(n0, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t131 = v in #t131.{self::IntClass::field} = #t131.{self::IntClass::field}{core::int}.{core::num::+}(1){(core::num) → core::int};
+  self::expect(n1, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t132 = v in #t132.{self::IntClass::field} = #t132.{self::IntClass::field}{core::int}.{core::num::-}(1){(core::num) → core::int};
+  self::expect(n0, v.{self::IntClass::field}{core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
-  self::expect(n1, let final self::IntClass* #t133 = v in let final core::int* #t134 = self::IntClassExtension|get#property(#t133).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t135 = self::IntClassExtension|set#property(#t133, #t134) in #t134);
-  self::expect(n2, let final self::IntClass* #t136 = v in let final core::int* #t137 = self::IntClassExtension|get#property(#t136).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t138 = self::IntClassExtension|set#property(#t136, #t137) in #t137);
-  self::expect(n0, let final self::IntClass* #t139 = v in let final core::int* #t140 = self::IntClassExtension|get#property(#t139).{core::num::-}(n2){(core::num*) →* core::int*} in let final void #t141 = self::IntClassExtension|set#property(#t139, #t140) in #t140);
-  self::expect(n1, let final self::IntClass* #t142 = v in let final core::int* #t143 = self::IntClassExtension|get#property(#t142).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t144 = self::IntClassExtension|set#property(#t142, #t143) in #t143);
-  self::expect(n0, let final self::IntClass* #t145 = v in let final core::int* #t146 = self::IntClassExtension|get#property(#t145).{core::num::-}(n1){(core::num*) →* core::int*} in let final void #t147 = self::IntClassExtension|set#property(#t145, #t146) in #t146);
-  self::expect(n1, let final self::IntClass* #t148 = v in let final core::int* #t149 = self::IntClassExtension|get#property(#t148).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t150 = self::IntClassExtension|set#property(#t148, #t149) in #t149);
-  self::expect(n0, let final self::IntClass* #t151 = v in let final core::int* #t152 = self::IntClassExtension|get#property(#t151).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t153 = self::IntClassExtension|set#property(#t151, #t152) in #t152);
-  self::expect(n0, let final self::IntClass* #t154 = v in let final core::int* #t155 = self::IntClassExtension|get#property(#t154) in let final core::int* #t156 = self::IntClassExtension|set#property(#t154, #t155.{core::num::+}(1){(core::num*) →* core::int*}) in #t155);
-  self::expect(n1, let final self::IntClass* #t157 = v in let final core::int* #t158 = self::IntClassExtension|get#property(#t157) in let final core::int* #t159 = self::IntClassExtension|set#property(#t157, #t158.{core::num::-}(1){(core::num*) →* core::int*}) in #t158);
+  self::expect(n1, let final self::IntClass #t133 = v in let final core::int #t134 = self::IntClassExtension|get#property(#t133).{core::num::+}(n1){(core::num) → core::int} in let final void #t135 = self::IntClassExtension|set#property(#t133, #t134) in #t134);
+  self::expect(n2, let final self::IntClass #t136 = v in let final core::int #t137 = self::IntClassExtension|get#property(#t136).{core::num::+}(n1){(core::num) → core::int} in let final void #t138 = self::IntClassExtension|set#property(#t136, #t137) in #t137);
+  self::expect(n0, let final self::IntClass #t139 = v in let final core::int #t140 = self::IntClassExtension|get#property(#t139).{core::num::-}(n2){(core::num) → core::int} in let final void #t141 = self::IntClassExtension|set#property(#t139, #t140) in #t140);
+  self::expect(n1, let final self::IntClass #t142 = v in let final core::int #t143 = self::IntClassExtension|get#property(#t142).{core::num::+}(n1){(core::num) → core::int} in let final void #t144 = self::IntClassExtension|set#property(#t142, #t143) in #t143);
+  self::expect(n0, let final self::IntClass #t145 = v in let final core::int #t146 = self::IntClassExtension|get#property(#t145).{core::num::-}(n1){(core::num) → core::int} in let final void #t147 = self::IntClassExtension|set#property(#t145, #t146) in #t146);
+  self::expect(n1, let final self::IntClass #t148 = v in let final core::int #t149 = self::IntClassExtension|get#property(#t148).{core::num::+}(1){(core::num) → core::int} in let final void #t150 = self::IntClassExtension|set#property(#t148, #t149) in #t149);
+  self::expect(n0, let final self::IntClass #t151 = v in let final core::int #t152 = self::IntClassExtension|get#property(#t151).{core::num::-}(1){(core::num) → core::int} in let final void #t153 = self::IntClassExtension|set#property(#t151, #t152) in #t152);
+  self::expect(n0, let final self::IntClass #t154 = v in let final core::int #t155 = self::IntClassExtension|get#property(#t154) in let final core::int #t156 = self::IntClassExtension|set#property(#t154, #t155.{core::num::+}(1){(core::num) → core::int}) in #t155);
+  self::expect(n1, let final self::IntClass #t157 = v in let final core::int #t158 = self::IntClassExtension|get#property(#t157) in let final core::int #t159 = self::IntClassExtension|set#property(#t157, #t158.{core::num::-}(1){(core::num) → core::int}) in #t158);
   self::expect(n0, self::IntClassExtension|get#property(v));
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t160 = v in self::IntClassExtension|set#property(#t160, self::IntClassExtension|get#property(#t160).{core::num::+}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t160 = v in self::IntClassExtension|set#property(#t160, self::IntClassExtension|get#property(#t160).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t161 = v in self::IntClassExtension|set#property(#t161, self::IntClassExtension|get#property(#t161).{core::num::+}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t161 = v in self::IntClassExtension|set#property(#t161, self::IntClassExtension|get#property(#t161).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n2, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t162 = v in self::IntClassExtension|set#property(#t162, self::IntClassExtension|get#property(#t162).{core::num::-}(n2){(core::num*) →* core::int*});
+  let final self::IntClass #t162 = v in self::IntClassExtension|set#property(#t162, self::IntClassExtension|get#property(#t162).{core::num::-}(n2){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t163 = v in self::IntClassExtension|set#property(#t163, self::IntClassExtension|get#property(#t163).{core::num::+}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t163 = v in self::IntClassExtension|set#property(#t163, self::IntClassExtension|get#property(#t163).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t164 = v in self::IntClassExtension|set#property(#t164, self::IntClassExtension|get#property(#t164).{core::num::-}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t164 = v in self::IntClassExtension|set#property(#t164, self::IntClassExtension|get#property(#t164).{core::num::-}(n1){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t165 = v in let final core::int* #t166 = self::IntClassExtension|get#property(#t165).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t167 = self::IntClassExtension|set#property(#t165, #t166) in #t166;
+  let final self::IntClass #t165 = v in let final core::int #t166 = self::IntClassExtension|get#property(#t165).{core::num::+}(1){(core::num) → core::int} in let final void #t167 = self::IntClassExtension|set#property(#t165, #t166) in #t166;
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t168 = v in let final core::int* #t169 = self::IntClassExtension|get#property(#t168).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t170 = self::IntClassExtension|set#property(#t168, #t169) in #t169;
+  let final self::IntClass #t168 = v in let final core::int #t169 = self::IntClassExtension|get#property(#t168).{core::num::-}(1){(core::num) → core::int} in let final void #t170 = self::IntClassExtension|set#property(#t168, #t169) in #t169;
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t171 = v in self::IntClassExtension|set#property(#t171, self::IntClassExtension|get#property(#t171).{core::num::+}(1){(core::num*) →* core::int*});
+  let final self::IntClass #t171 = v in self::IntClassExtension|set#property(#t171, self::IntClassExtension|get#property(#t171).{core::num::+}(1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t172 = v in self::IntClassExtension|set#property(#t172, self::IntClassExtension|get#property(#t172).{core::num::-}(1){(core::num*) →* core::int*});
+  let final self::IntClass #t172 = v in self::IntClassExtension|set#property(#t172, self::IntClassExtension|get#property(#t172).{core::num::-}(1){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
 }
 static method testExplicitProperties() → dynamic {
-  self::Number* n0 = new self::Number::•(0);
-  self::Number* n1 = new self::Number::•(1);
-  self::Number* n2 = new self::Number::•(2);
-  self::Class* v = new self::Class::•(n0);
+  self::Number n0 = new self::Number::•(0);
+  self::Number n1 = new self::Number::•(1);
+  self::Number n2 = new self::Number::•(2);
+  self::Class v = new self::Class::•(n0);
   self::expect(n0, self::ClassExtension|get#property(v));
-  self::expect(n1, let final self::Class* #t173 = v in let final self::Number* #t174 = self::NumberExtension|+(self::ClassExtension|get#property(#t173), n1) in let final void #t175 = self::ClassExtension|set#property(#t173, #t174) in #t174);
-  self::expect(n2, let final self::Class* #t176 = v in let final self::Number* #t177 = self::NumberExtension|+(self::ClassExtension|get#property(#t176), n1) in let final void #t178 = self::ClassExtension|set#property(#t176, #t177) in #t177);
-  self::expect(n0, let final self::Class* #t179 = v in let final self::Number* #t180 = self::NumberExtension|-(self::ClassExtension|get#property(#t179), n2) in let final void #t181 = self::ClassExtension|set#property(#t179, #t180) in #t180);
-  self::expect(n1, let final self::Class* #t182 = v in let final self::Number* #t183 = self::NumberExtension|+(self::ClassExtension|get#property(#t182), n1) in let final void #t184 = self::ClassExtension|set#property(#t182, #t183) in #t183);
-  self::expect(n0, let final self::Class* #t185 = v in let final self::Number* #t186 = self::NumberExtension|-(self::ClassExtension|get#property(#t185), n1) in let final void #t187 = self::ClassExtension|set#property(#t185, #t186) in #t186);
-  self::expect(n1, let final self::Class* #t188 = v in let final self::Number* #t189 = self::NumberExtension|+(self::ClassExtension|get#property(#t188), 1) in let final void #t190 = self::ClassExtension|set#property(#t188, #t189) in #t189);
-  self::expect(n0, let final self::Class* #t191 = v in let final self::Number* #t192 = self::NumberExtension|-(self::ClassExtension|get#property(#t191), 1) in let final void #t193 = self::ClassExtension|set#property(#t191, #t192) in #t192);
-  self::expect(n0, let final self::Class* #t194 = v in let final self::Number* #t195 = self::ClassExtension|get#property(#t194) in let final self::Number* #t196 = let final self::Number* #t197 = self::NumberExtension|+(#t195, 1) in let final void #t198 = self::ClassExtension|set#property(#t194, #t197) in #t197 in #t195);
-  self::expect(n1, let final self::Class* #t199 = v in let final self::Number* #t200 = self::ClassExtension|get#property(#t199) in let final self::Number* #t201 = let final self::Number* #t202 = self::NumberExtension|-(#t200, 1) in let final void #t203 = self::ClassExtension|set#property(#t199, #t202) in #t202 in #t200);
+  self::expect(n1, let final self::Class #t173 = v in let final self::Number #t174 = self::NumberExtension|+(self::ClassExtension|get#property(#t173), n1) in let final void #t175 = self::ClassExtension|set#property(#t173, #t174) in #t174);
+  self::expect(n2, let final self::Class #t176 = v in let final self::Number #t177 = self::NumberExtension|+(self::ClassExtension|get#property(#t176), n1) in let final void #t178 = self::ClassExtension|set#property(#t176, #t177) in #t177);
+  self::expect(n0, let final self::Class #t179 = v in let final self::Number #t180 = self::NumberExtension|-(self::ClassExtension|get#property(#t179), n2) in let final void #t181 = self::ClassExtension|set#property(#t179, #t180) in #t180);
+  self::expect(n1, let final self::Class #t182 = v in let final self::Number #t183 = self::NumberExtension|+(self::ClassExtension|get#property(#t182), n1) in let final void #t184 = self::ClassExtension|set#property(#t182, #t183) in #t183);
+  self::expect(n0, let final self::Class #t185 = v in let final self::Number #t186 = self::NumberExtension|-(self::ClassExtension|get#property(#t185), n1) in let final void #t187 = self::ClassExtension|set#property(#t185, #t186) in #t186);
+  self::expect(n1, let final self::Class #t188 = v in let final self::Number #t189 = self::NumberExtension|+(self::ClassExtension|get#property(#t188), 1) in let final void #t190 = self::ClassExtension|set#property(#t188, #t189) in #t189);
+  self::expect(n0, let final self::Class #t191 = v in let final self::Number #t192 = self::NumberExtension|-(self::ClassExtension|get#property(#t191), 1) in let final void #t193 = self::ClassExtension|set#property(#t191, #t192) in #t192);
+  self::expect(n0, let final self::Class #t194 = v in let final self::Number #t195 = self::ClassExtension|get#property(#t194) in let final self::Number #t196 = let final self::Number #t197 = self::NumberExtension|+(#t195, 1) in let final void #t198 = self::ClassExtension|set#property(#t194, #t197) in #t197 in #t195);
+  self::expect(n1, let final self::Class #t199 = v in let final self::Number #t200 = self::ClassExtension|get#property(#t199) in let final self::Number #t201 = let final self::Number #t202 = self::NumberExtension|-(#t200, 1) in let final void #t203 = self::ClassExtension|set#property(#t199, #t202) in #t202 in #t200);
   self::expect(n0, self::ClassExtension|get#property(v));
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t204 = v in self::ClassExtension|set#property(#t204, self::NumberExtension|+(self::ClassExtension|get#property(#t204), n1));
+  let final self::Class #t204 = v in self::ClassExtension|set#property(#t204, self::NumberExtension|+(self::ClassExtension|get#property(#t204), n1));
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t205 = v in self::ClassExtension|set#property(#t205, self::NumberExtension|+(self::ClassExtension|get#property(#t205), n1));
+  let final self::Class #t205 = v in self::ClassExtension|set#property(#t205, self::NumberExtension|+(self::ClassExtension|get#property(#t205), n1));
   self::expect(n2, self::ClassExtension|get#property(v));
-  let final self::Class* #t206 = v in self::ClassExtension|set#property(#t206, self::NumberExtension|-(self::ClassExtension|get#property(#t206), n2));
+  let final self::Class #t206 = v in self::ClassExtension|set#property(#t206, self::NumberExtension|-(self::ClassExtension|get#property(#t206), n2));
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t207 = v in self::ClassExtension|set#property(#t207, self::NumberExtension|+(self::ClassExtension|get#property(#t207), n1));
+  let final self::Class #t207 = v in self::ClassExtension|set#property(#t207, self::NumberExtension|+(self::ClassExtension|get#property(#t207), n1));
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t208 = v in self::ClassExtension|set#property(#t208, self::NumberExtension|-(self::ClassExtension|get#property(#t208), n1));
+  let final self::Class #t208 = v in self::ClassExtension|set#property(#t208, self::NumberExtension|-(self::ClassExtension|get#property(#t208), n1));
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t209 = v in let final self::Number* #t210 = self::NumberExtension|+(self::ClassExtension|get#property(#t209), 1) in let final void #t211 = self::ClassExtension|set#property(#t209, #t210) in #t210;
+  let final self::Class #t209 = v in let final self::Number #t210 = self::NumberExtension|+(self::ClassExtension|get#property(#t209), 1) in let final void #t211 = self::ClassExtension|set#property(#t209, #t210) in #t210;
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t212 = v in let final self::Number* #t213 = self::NumberExtension|-(self::ClassExtension|get#property(#t212), 1) in let final void #t214 = self::ClassExtension|set#property(#t212, #t213) in #t213;
+  let final self::Class #t212 = v in let final self::Number #t213 = self::NumberExtension|-(self::ClassExtension|get#property(#t212), 1) in let final void #t214 = self::ClassExtension|set#property(#t212, #t213) in #t213;
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t215 = v in self::ClassExtension|set#property(#t215, self::NumberExtension|+(self::ClassExtension|get#property(#t215), 1));
+  let final self::Class #t215 = v in self::ClassExtension|set#property(#t215, self::NumberExtension|+(self::ClassExtension|get#property(#t215), 1));
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t216 = v in self::ClassExtension|set#property(#t216, self::NumberExtension|-(self::ClassExtension|get#property(#t216), 1));
+  let final self::Class #t216 = v in self::ClassExtension|set#property(#t216, self::NumberExtension|-(self::ClassExtension|get#property(#t216), 1));
   self::expect(n0, self::ClassExtension|get#property(v));
 }
 static method testExplicitIntProperties() → dynamic {
-  core::int* n0 = 0;
-  core::int* n1 = 1;
-  core::int* n2 = 2;
-  self::IntClass* v = new self::IntClass::•(n0);
+  core::int n0 = 0;
+  core::int n1 = 1;
+  core::int n2 = 2;
+  self::IntClass v = new self::IntClass::•(n0);
   self::expect(n0, self::IntClassExtension|get#property(v));
-  self::expect(n1, let final self::IntClass* #t217 = v in let final core::int* #t218 = self::IntClassExtension|get#property(#t217).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t219 = self::IntClassExtension|set#property(#t217, #t218) in #t218);
-  self::expect(n2, let final self::IntClass* #t220 = v in let final core::int* #t221 = self::IntClassExtension|get#property(#t220).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t222 = self::IntClassExtension|set#property(#t220, #t221) in #t221);
-  self::expect(n0, let final self::IntClass* #t223 = v in let final core::int* #t224 = self::IntClassExtension|get#property(#t223).{core::num::-}(n2){(core::num*) →* core::int*} in let final void #t225 = self::IntClassExtension|set#property(#t223, #t224) in #t224);
-  self::expect(n1, let final self::IntClass* #t226 = v in let final core::int* #t227 = self::IntClassExtension|get#property(#t226).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t228 = self::IntClassExtension|set#property(#t226, #t227) in #t227);
-  self::expect(n0, let final self::IntClass* #t229 = v in let final core::int* #t230 = self::IntClassExtension|get#property(#t229).{core::num::-}(n1){(core::num*) →* core::int*} in let final void #t231 = self::IntClassExtension|set#property(#t229, #t230) in #t230);
-  self::expect(n1, let final self::IntClass* #t232 = v in let final core::int* #t233 = self::IntClassExtension|get#property(#t232).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t234 = self::IntClassExtension|set#property(#t232, #t233) in #t233);
-  self::expect(n0, let final self::IntClass* #t235 = v in let final core::int* #t236 = self::IntClassExtension|get#property(#t235).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t237 = self::IntClassExtension|set#property(#t235, #t236) in #t236);
-  self::expect(n0, let final self::IntClass* #t238 = v in let final core::int* #t239 = self::IntClassExtension|get#property(#t238) in let final core::int* #t240 = let final core::int* #t241 = #t239.{core::num::+}(1){(core::num*) →* core::int*} in let final void #t242 = self::IntClassExtension|set#property(#t238, #t241) in #t241 in #t239);
-  self::expect(n1, let final self::IntClass* #t243 = v in let final core::int* #t244 = self::IntClassExtension|get#property(#t243) in let final core::int* #t245 = let final core::int* #t246 = #t244.{core::num::-}(1){(core::num*) →* core::int*} in let final void #t247 = self::IntClassExtension|set#property(#t243, #t246) in #t246 in #t244);
+  self::expect(n1, let final self::IntClass #t217 = v in let final core::int #t218 = self::IntClassExtension|get#property(#t217).{core::num::+}(n1){(core::num) → core::int} in let final void #t219 = self::IntClassExtension|set#property(#t217, #t218) in #t218);
+  self::expect(n2, let final self::IntClass #t220 = v in let final core::int #t221 = self::IntClassExtension|get#property(#t220).{core::num::+}(n1){(core::num) → core::int} in let final void #t222 = self::IntClassExtension|set#property(#t220, #t221) in #t221);
+  self::expect(n0, let final self::IntClass #t223 = v in let final core::int #t224 = self::IntClassExtension|get#property(#t223).{core::num::-}(n2){(core::num) → core::int} in let final void #t225 = self::IntClassExtension|set#property(#t223, #t224) in #t224);
+  self::expect(n1, let final self::IntClass #t226 = v in let final core::int #t227 = self::IntClassExtension|get#property(#t226).{core::num::+}(n1){(core::num) → core::int} in let final void #t228 = self::IntClassExtension|set#property(#t226, #t227) in #t227);
+  self::expect(n0, let final self::IntClass #t229 = v in let final core::int #t230 = self::IntClassExtension|get#property(#t229).{core::num::-}(n1){(core::num) → core::int} in let final void #t231 = self::IntClassExtension|set#property(#t229, #t230) in #t230);
+  self::expect(n1, let final self::IntClass #t232 = v in let final core::int #t233 = self::IntClassExtension|get#property(#t232).{core::num::+}(1){(core::num) → core::int} in let final void #t234 = self::IntClassExtension|set#property(#t232, #t233) in #t233);
+  self::expect(n0, let final self::IntClass #t235 = v in let final core::int #t236 = self::IntClassExtension|get#property(#t235).{core::num::-}(1){(core::num) → core::int} in let final void #t237 = self::IntClassExtension|set#property(#t235, #t236) in #t236);
+  self::expect(n0, let final self::IntClass #t238 = v in let final core::int #t239 = self::IntClassExtension|get#property(#t238) in let final core::int #t240 = let final core::int #t241 = #t239.{core::num::+}(1){(core::num) → core::int} in let final void #t242 = self::IntClassExtension|set#property(#t238, #t241) in #t241 in #t239);
+  self::expect(n1, let final self::IntClass #t243 = v in let final core::int #t244 = self::IntClassExtension|get#property(#t243) in let final core::int #t245 = let final core::int #t246 = #t244.{core::num::-}(1){(core::num) → core::int} in let final void #t247 = self::IntClassExtension|set#property(#t243, #t246) in #t246 in #t244);
   self::expect(n0, self::IntClassExtension|get#property(v));
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t248 = v in self::IntClassExtension|set#property(#t248, self::IntClassExtension|get#property(#t248).{core::num::+}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t248 = v in self::IntClassExtension|set#property(#t248, self::IntClassExtension|get#property(#t248).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t249 = v in self::IntClassExtension|set#property(#t249, self::IntClassExtension|get#property(#t249).{core::num::+}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t249 = v in self::IntClassExtension|set#property(#t249, self::IntClassExtension|get#property(#t249).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n2, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t250 = v in self::IntClassExtension|set#property(#t250, self::IntClassExtension|get#property(#t250).{core::num::-}(n2){(core::num*) →* core::int*});
+  let final self::IntClass #t250 = v in self::IntClassExtension|set#property(#t250, self::IntClassExtension|get#property(#t250).{core::num::-}(n2){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t251 = v in self::IntClassExtension|set#property(#t251, self::IntClassExtension|get#property(#t251).{core::num::+}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t251 = v in self::IntClassExtension|set#property(#t251, self::IntClassExtension|get#property(#t251).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t252 = v in self::IntClassExtension|set#property(#t252, self::IntClassExtension|get#property(#t252).{core::num::-}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t252 = v in self::IntClassExtension|set#property(#t252, self::IntClassExtension|get#property(#t252).{core::num::-}(n1){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t253 = v in let final core::int* #t254 = self::IntClassExtension|get#property(#t253).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t255 = self::IntClassExtension|set#property(#t253, #t254) in #t254;
+  let final self::IntClass #t253 = v in let final core::int #t254 = self::IntClassExtension|get#property(#t253).{core::num::+}(1){(core::num) → core::int} in let final void #t255 = self::IntClassExtension|set#property(#t253, #t254) in #t254;
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t256 = v in let final core::int* #t257 = self::IntClassExtension|get#property(#t256).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t258 = self::IntClassExtension|set#property(#t256, #t257) in #t257;
+  let final self::IntClass #t256 = v in let final core::int #t257 = self::IntClassExtension|get#property(#t256).{core::num::-}(1){(core::num) → core::int} in let final void #t258 = self::IntClassExtension|set#property(#t256, #t257) in #t257;
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t259 = v in self::IntClassExtension|set#property(#t259, self::IntClassExtension|get#property(#t259).{core::num::+}(1){(core::num*) →* core::int*});
+  let final self::IntClass #t259 = v in self::IntClassExtension|set#property(#t259, self::IntClassExtension|get#property(#t259).{core::num::+}(1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t260 = v in self::IntClassExtension|set#property(#t260, self::IntClassExtension|get#property(#t260).{core::num::-}(1){(core::num*) →* core::int*});
+  let final self::IntClass #t260 = v in self::IntClassExtension|set#property(#t260, self::IntClassExtension|get#property(#t260).{core::num::-}(1){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
 }
-static method testExplicitNullAwareProperties(self::Class* v) → dynamic {
-  self::Number* n0 = new self::Number::•(0);
-  self::Number* n1 = new self::Number::•(1);
-  self::Number* n2 = new self::Number::•(2);
-  self::expect(n0, let final self::Class* #t261 = v in #t261 == null ?{self::Number*} null : self::ClassExtension|get#property(#t261), v == null);
-  self::expect(n1, let final self::Class* #t262 = v in #t262 == null ?{self::Number*} null : let final self::Number* #t263 = self::NumberExtension|+(self::ClassExtension|get#property(#t262), n1) in let final void #t264 = self::ClassExtension|set#property(#t262, #t263) in #t263, v == null);
-  self::expect(n2, let final self::Class* #t265 = v in #t265 == null ?{self::Number*} null : let final self::Number* #t266 = self::NumberExtension|+(self::ClassExtension|get#property(#t265), n1) in let final void #t267 = self::ClassExtension|set#property(#t265, #t266) in #t266, v == null);
-  self::expect(n0, let final self::Class* #t268 = v in #t268 == null ?{self::Number*} null : let final self::Number* #t269 = self::NumberExtension|-(self::ClassExtension|get#property(#t268), n2) in let final void #t270 = self::ClassExtension|set#property(#t268, #t269) in #t269, v == null);
-  self::expect(n1, let final self::Class* #t271 = v in #t271 == null ?{self::Number*} null : let final self::Number* #t272 = self::NumberExtension|+(self::ClassExtension|get#property(#t271), n1) in let final void #t273 = self::ClassExtension|set#property(#t271, #t272) in #t272, v == null);
-  self::expect(n0, let final self::Class* #t274 = v in #t274 == null ?{self::Number*} null : let final self::Number* #t275 = self::NumberExtension|-(self::ClassExtension|get#property(#t274), n1) in let final void #t276 = self::ClassExtension|set#property(#t274, #t275) in #t275, v == null);
-  self::expect(n1, let final self::Class* #t277 = v in #t277 == null ?{self::Number*} null : let final self::Number* #t278 = self::NumberExtension|+(self::ClassExtension|get#property(#t277), 1) in let final void #t279 = self::ClassExtension|set#property(#t277, #t278) in #t278, v == null);
-  self::expect(n0, let final self::Class* #t280 = v in #t280 == null ?{self::Number*} null : let final self::Number* #t281 = self::NumberExtension|-(self::ClassExtension|get#property(#t280), 1) in let final void #t282 = self::ClassExtension|set#property(#t280, #t281) in #t281, v == null);
-  self::expect(n0, let final self::Class* #t283 = v in #t283 == null ?{self::Number*} null : let final self::Number* #t284 = self::ClassExtension|get#property(#t283) in let final self::Number* #t285 = let final self::Number* #t286 = self::NumberExtension|+(#t284, 1) in let final void #t287 = self::ClassExtension|set#property(#t283, #t286) in #t286 in #t284, v == null);
-  self::expect(n1, let final self::Class* #t288 = v in #t288 == null ?{self::Number*} null : let final self::Number* #t289 = self::ClassExtension|get#property(#t288) in let final self::Number* #t290 = let final self::Number* #t291 = self::NumberExtension|-(#t289, 1) in let final void #t292 = self::ClassExtension|set#property(#t288, #t291) in #t291 in #t289, v == null);
-  self::expect(n0, let final self::Class* #t293 = v in #t293 == null ?{self::Number*} null : self::ClassExtension|get#property(#t293), v == null);
-  self::expect(n0, let final self::Class* #t294 = v in #t294 == null ?{self::Number*} null : self::ClassExtension|get#property(#t294), v == null);
-  let final self::Class* #t295 = v in #t295 == null ?{self::Number*} null : self::ClassExtension|set#property(#t295, self::NumberExtension|+(self::ClassExtension|get#property(#t295), n1));
-  self::expect(n1, let final self::Class* #t296 = v in #t296 == null ?{self::Number*} null : self::ClassExtension|get#property(#t296), v == null);
-  let final self::Class* #t297 = v in #t297 == null ?{self::Number*} null : self::ClassExtension|set#property(#t297, self::NumberExtension|+(self::ClassExtension|get#property(#t297), n1));
-  self::expect(n2, let final self::Class* #t298 = v in #t298 == null ?{self::Number*} null : self::ClassExtension|get#property(#t298), v == null);
-  let final self::Class* #t299 = v in #t299 == null ?{self::Number*} null : self::ClassExtension|set#property(#t299, self::NumberExtension|-(self::ClassExtension|get#property(#t299), n2));
-  self::expect(n0, let final self::Class* #t300 = v in #t300 == null ?{self::Number*} null : self::ClassExtension|get#property(#t300), v == null);
-  let final self::Class* #t301 = v in #t301 == null ?{self::Number*} null : self::ClassExtension|set#property(#t301, self::NumberExtension|+(self::ClassExtension|get#property(#t301), n1));
-  self::expect(n1, let final self::Class* #t302 = v in #t302 == null ?{self::Number*} null : self::ClassExtension|get#property(#t302), v == null);
-  let final self::Class* #t303 = v in #t303 == null ?{self::Number*} null : self::ClassExtension|set#property(#t303, self::NumberExtension|-(self::ClassExtension|get#property(#t303), n1));
-  self::expect(n0, let final self::Class* #t304 = v in #t304 == null ?{self::Number*} null : self::ClassExtension|get#property(#t304), v == null);
-  let final self::Class* #t305 = v in #t305 == null ?{self::Number*} null : let final self::Number* #t306 = self::NumberExtension|+(self::ClassExtension|get#property(#t305), 1) in let final void #t307 = self::ClassExtension|set#property(#t305, #t306) in #t306;
-  self::expect(n1, let final self::Class* #t308 = v in #t308 == null ?{self::Number*} null : self::ClassExtension|get#property(#t308), v == null);
-  let final self::Class* #t309 = v in #t309 == null ?{self::Number*} null : let final self::Number* #t310 = self::NumberExtension|-(self::ClassExtension|get#property(#t309), 1) in let final void #t311 = self::ClassExtension|set#property(#t309, #t310) in #t310;
-  self::expect(n0, let final self::Class* #t312 = v in #t312 == null ?{self::Number*} null : self::ClassExtension|get#property(#t312), v == null);
-  let final self::Class* #t313 = v in #t313 == null ?{self::Number*} null : self::ClassExtension|set#property(#t313, self::NumberExtension|+(self::ClassExtension|get#property(#t313), 1));
-  self::expect(n1, let final self::Class* #t314 = v in #t314 == null ?{self::Number*} null : self::ClassExtension|get#property(#t314), v == null);
-  let final self::Class* #t315 = v in #t315 == null ?{self::Number*} null : self::ClassExtension|set#property(#t315, self::NumberExtension|-(self::ClassExtension|get#property(#t315), 1));
-  self::expect(n0, let final self::Class* #t316 = v in #t316 == null ?{self::Number*} null : self::ClassExtension|get#property(#t316), v == null);
+static method testExplicitNullAwareProperties(self::Class? v) → dynamic {
+  self::Number n0 = new self::Number::•(0);
+  self::Number n1 = new self::Number::•(1);
+  self::Number n2 = new self::Number::•(2);
+  self::expect(n0, let final self::Class? #t261 = v in #t261 == null ?{self::Number?} null : self::ClassExtension|get#property(#t261{self::Class}), v == null);
+  self::expect(n1, let final self::Class? #t262 = v in #t262 == null ?{self::Number?} null : let final self::Number #t263 = self::NumberExtension|+(self::ClassExtension|get#property(#t262{self::Class}), n1) in let final void #t264 = self::ClassExtension|set#property(#t262{self::Class}, #t263) in #t263, v == null);
+  self::expect(n2, let final self::Class? #t265 = v in #t265 == null ?{self::Number?} null : let final self::Number #t266 = self::NumberExtension|+(self::ClassExtension|get#property(#t265{self::Class}), n1) in let final void #t267 = self::ClassExtension|set#property(#t265{self::Class}, #t266) in #t266, v == null);
+  self::expect(n0, let final self::Class? #t268 = v in #t268 == null ?{self::Number?} null : let final self::Number #t269 = self::NumberExtension|-(self::ClassExtension|get#property(#t268{self::Class}), n2) in let final void #t270 = self::ClassExtension|set#property(#t268{self::Class}, #t269) in #t269, v == null);
+  self::expect(n1, let final self::Class? #t271 = v in #t271 == null ?{self::Number?} null : let final self::Number #t272 = self::NumberExtension|+(self::ClassExtension|get#property(#t271{self::Class}), n1) in let final void #t273 = self::ClassExtension|set#property(#t271{self::Class}, #t272) in #t272, v == null);
+  self::expect(n0, let final self::Class? #t274 = v in #t274 == null ?{self::Number?} null : let final self::Number #t275 = self::NumberExtension|-(self::ClassExtension|get#property(#t274{self::Class}), n1) in let final void #t276 = self::ClassExtension|set#property(#t274{self::Class}, #t275) in #t275, v == null);
+  self::expect(n1, let final self::Class? #t277 = v in #t277 == null ?{self::Number?} null : let final self::Number #t278 = self::NumberExtension|+(self::ClassExtension|get#property(#t277{self::Class}), 1) in let final void #t279 = self::ClassExtension|set#property(#t277{self::Class}, #t278) in #t278, v == null);
+  self::expect(n0, let final self::Class? #t280 = v in #t280 == null ?{self::Number?} null : let final self::Number #t281 = self::NumberExtension|-(self::ClassExtension|get#property(#t280{self::Class}), 1) in let final void #t282 = self::ClassExtension|set#property(#t280{self::Class}, #t281) in #t281, v == null);
+  self::expect(n0, let final self::Class? #t283 = v in #t283 == null ?{self::Number?} null : let final self::Number #t284 = self::ClassExtension|get#property(#t283{self::Class}) in let final self::Number #t285 = let final self::Number #t286 = self::NumberExtension|+(#t284, 1) in let final void #t287 = self::ClassExtension|set#property(#t283{self::Class}, #t286) in #t286 in #t284, v == null);
+  self::expect(n1, let final self::Class? #t288 = v in #t288 == null ?{self::Number?} null : let final self::Number #t289 = self::ClassExtension|get#property(#t288{self::Class}) in let final self::Number #t290 = let final self::Number #t291 = self::NumberExtension|-(#t289, 1) in let final void #t292 = self::ClassExtension|set#property(#t288{self::Class}, #t291) in #t291 in #t289, v == null);
+  self::expect(n0, let final self::Class? #t293 = v in #t293 == null ?{self::Number?} null : self::ClassExtension|get#property(#t293{self::Class}), v == null);
+  self::expect(n0, let final self::Class? #t294 = v in #t294 == null ?{self::Number?} null : self::ClassExtension|get#property(#t294{self::Class}), v == null);
+  let final self::Class? #t295 = v in #t295 == null ?{self::Number?} null : self::ClassExtension|set#property(#t295{self::Class}, self::NumberExtension|+(self::ClassExtension|get#property(#t295{self::Class}), n1));
+  self::expect(n1, let final self::Class? #t296 = v in #t296 == null ?{self::Number?} null : self::ClassExtension|get#property(#t296{self::Class}), v == null);
+  let final self::Class? #t297 = v in #t297 == null ?{self::Number?} null : self::ClassExtension|set#property(#t297{self::Class}, self::NumberExtension|+(self::ClassExtension|get#property(#t297{self::Class}), n1));
+  self::expect(n2, let final self::Class? #t298 = v in #t298 == null ?{self::Number?} null : self::ClassExtension|get#property(#t298{self::Class}), v == null);
+  let final self::Class? #t299 = v in #t299 == null ?{self::Number?} null : self::ClassExtension|set#property(#t299{self::Class}, self::NumberExtension|-(self::ClassExtension|get#property(#t299{self::Class}), n2));
+  self::expect(n0, let final self::Class? #t300 = v in #t300 == null ?{self::Number?} null : self::ClassExtension|get#property(#t300{self::Class}), v == null);
+  let final self::Class? #t301 = v in #t301 == null ?{self::Number?} null : self::ClassExtension|set#property(#t301{self::Class}, self::NumberExtension|+(self::ClassExtension|get#property(#t301{self::Class}), n1));
+  self::expect(n1, let final self::Class? #t302 = v in #t302 == null ?{self::Number?} null : self::ClassExtension|get#property(#t302{self::Class}), v == null);
+  let final self::Class? #t303 = v in #t303 == null ?{self::Number?} null : self::ClassExtension|set#property(#t303{self::Class}, self::NumberExtension|-(self::ClassExtension|get#property(#t303{self::Class}), n1));
+  self::expect(n0, let final self::Class? #t304 = v in #t304 == null ?{self::Number?} null : self::ClassExtension|get#property(#t304{self::Class}), v == null);
+  let final self::Class? #t305 = v in #t305 == null ?{self::Number?} null : let final self::Number #t306 = self::NumberExtension|+(self::ClassExtension|get#property(#t305{self::Class}), 1) in let final void #t307 = self::ClassExtension|set#property(#t305{self::Class}, #t306) in #t306;
+  self::expect(n1, let final self::Class? #t308 = v in #t308 == null ?{self::Number?} null : self::ClassExtension|get#property(#t308{self::Class}), v == null);
+  let final self::Class? #t309 = v in #t309 == null ?{self::Number?} null : let final self::Number #t310 = self::NumberExtension|-(self::ClassExtension|get#property(#t309{self::Class}), 1) in let final void #t311 = self::ClassExtension|set#property(#t309{self::Class}, #t310) in #t310;
+  self::expect(n0, let final self::Class? #t312 = v in #t312 == null ?{self::Number?} null : self::ClassExtension|get#property(#t312{self::Class}), v == null);
+  let final self::Class? #t313 = v in #t313 == null ?{self::Number?} null : self::ClassExtension|set#property(#t313{self::Class}, self::NumberExtension|+(self::ClassExtension|get#property(#t313{self::Class}), 1));
+  self::expect(n1, let final self::Class? #t314 = v in #t314 == null ?{self::Number?} null : self::ClassExtension|get#property(#t314{self::Class}), v == null);
+  let final self::Class? #t315 = v in #t315 == null ?{self::Number?} null : self::ClassExtension|set#property(#t315{self::Class}, self::NumberExtension|-(self::ClassExtension|get#property(#t315{self::Class}), 1));
+  self::expect(n0, let final self::Class? #t316 = v in #t316 == null ?{self::Number?} null : self::ClassExtension|get#property(#t316{self::Class}), v == null);
 }
-static method testExplicitNullAwareIntProperties(self::IntClass* v) → dynamic {
-  core::int* n0 = 0;
-  core::int* n1 = 1;
-  core::int* n2 = 2;
-  self::expect(n0, let final self::IntClass* #t317 = v in #t317 == null ?{core::int*} null : self::IntClassExtension|get#property(#t317), v == null);
-  self::expect(n1, let final self::IntClass* #t318 = v in #t318 == null ?{core::int*} null : let final core::int* #t319 = self::IntClassExtension|get#property(#t318).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t320 = self::IntClassExtension|set#property(#t318, #t319) in #t319, v == null);
-  self::expect(n2, let final self::IntClass* #t321 = v in #t321 == null ?{core::int*} null : let final core::int* #t322 = self::IntClassExtension|get#property(#t321).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t323 = self::IntClassExtension|set#property(#t321, #t322) in #t322, v == null);
-  self::expect(n0, let final self::IntClass* #t324 = v in #t324 == null ?{core::int*} null : let final core::int* #t325 = self::IntClassExtension|get#property(#t324).{core::num::-}(n2){(core::num*) →* core::int*} in let final void #t326 = self::IntClassExtension|set#property(#t324, #t325) in #t325, v == null);
-  self::expect(n1, let final self::IntClass* #t327 = v in #t327 == null ?{core::int*} null : let final core::int* #t328 = self::IntClassExtension|get#property(#t327).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t329 = self::IntClassExtension|set#property(#t327, #t328) in #t328, v == null);
-  self::expect(n0, let final self::IntClass* #t330 = v in #t330 == null ?{core::int*} null : let final core::int* #t331 = self::IntClassExtension|get#property(#t330).{core::num::-}(n1){(core::num*) →* core::int*} in let final void #t332 = self::IntClassExtension|set#property(#t330, #t331) in #t331, v == null);
-  self::expect(n1, let final self::IntClass* #t333 = v in #t333 == null ?{core::int*} null : let final core::int* #t334 = self::IntClassExtension|get#property(#t333).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t335 = self::IntClassExtension|set#property(#t333, #t334) in #t334, v == null);
-  self::expect(n0, let final self::IntClass* #t336 = v in #t336 == null ?{core::int*} null : let final core::int* #t337 = self::IntClassExtension|get#property(#t336).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t338 = self::IntClassExtension|set#property(#t336, #t337) in #t337, v == null);
-  self::expect(n0, let final self::IntClass* #t339 = v in #t339 == null ?{core::int*} null : let final core::int* #t340 = self::IntClassExtension|get#property(#t339) in let final core::int* #t341 = let final core::int* #t342 = #t340.{core::num::+}(1){(core::num*) →* core::int*} in let final void #t343 = self::IntClassExtension|set#property(#t339, #t342) in #t342 in #t340, v == null);
-  self::expect(n1, let final self::IntClass* #t344 = v in #t344 == null ?{core::int*} null : let final core::int* #t345 = self::IntClassExtension|get#property(#t344) in let final core::int* #t346 = let final core::int* #t347 = #t345.{core::num::-}(1){(core::num*) →* core::int*} in let final void #t348 = self::IntClassExtension|set#property(#t344, #t347) in #t347 in #t345, v == null);
-  self::expect(n0, let final self::IntClass* #t349 = v in #t349 == null ?{core::int*} null : self::IntClassExtension|get#property(#t349), v == null);
-  self::expect(n0, let final self::IntClass* #t350 = v in #t350 == null ?{core::int*} null : self::IntClassExtension|get#property(#t350), v == null);
-  let final self::IntClass* #t351 = v in #t351 == null ?{core::int*} null : self::IntClassExtension|set#property(#t351, self::IntClassExtension|get#property(#t351).{core::num::+}(n1){(core::num*) →* core::int*});
-  self::expect(n1, let final self::IntClass* #t352 = v in #t352 == null ?{core::int*} null : self::IntClassExtension|get#property(#t352), v == null);
-  let final self::IntClass* #t353 = v in #t353 == null ?{core::int*} null : self::IntClassExtension|set#property(#t353, self::IntClassExtension|get#property(#t353).{core::num::+}(n1){(core::num*) →* core::int*});
-  self::expect(n2, let final self::IntClass* #t354 = v in #t354 == null ?{core::int*} null : self::IntClassExtension|get#property(#t354), v == null);
-  let final self::IntClass* #t355 = v in #t355 == null ?{core::int*} null : self::IntClassExtension|set#property(#t355, self::IntClassExtension|get#property(#t355).{core::num::-}(n2){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t356 = v in #t356 == null ?{core::int*} null : self::IntClassExtension|get#property(#t356), v == null);
-  let final self::IntClass* #t357 = v in #t357 == null ?{core::int*} null : self::IntClassExtension|set#property(#t357, self::IntClassExtension|get#property(#t357).{core::num::+}(n1){(core::num*) →* core::int*});
-  self::expect(n1, let final self::IntClass* #t358 = v in #t358 == null ?{core::int*} null : self::IntClassExtension|get#property(#t358), v == null);
-  let final self::IntClass* #t359 = v in #t359 == null ?{core::int*} null : self::IntClassExtension|set#property(#t359, self::IntClassExtension|get#property(#t359).{core::num::-}(n1){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t360 = v in #t360 == null ?{core::int*} null : self::IntClassExtension|get#property(#t360), v == null);
-  let final self::IntClass* #t361 = v in #t361 == null ?{core::int*} null : let final core::int* #t362 = self::IntClassExtension|get#property(#t361).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t363 = self::IntClassExtension|set#property(#t361, #t362) in #t362;
-  self::expect(n1, let final self::IntClass* #t364 = v in #t364 == null ?{core::int*} null : self::IntClassExtension|get#property(#t364), v == null);
-  let final self::IntClass* #t365 = v in #t365 == null ?{core::int*} null : let final core::int* #t366 = self::IntClassExtension|get#property(#t365).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t367 = self::IntClassExtension|set#property(#t365, #t366) in #t366;
-  self::expect(n0, let final self::IntClass* #t368 = v in #t368 == null ?{core::int*} null : self::IntClassExtension|get#property(#t368), v == null);
-  let final self::IntClass* #t369 = v in #t369 == null ?{core::int*} null : self::IntClassExtension|set#property(#t369, self::IntClassExtension|get#property(#t369).{core::num::+}(1){(core::num*) →* core::int*});
-  self::expect(n1, let final self::IntClass* #t370 = v in #t370 == null ?{core::int*} null : self::IntClassExtension|get#property(#t370), v == null);
-  let final self::IntClass* #t371 = v in #t371 == null ?{core::int*} null : self::IntClassExtension|set#property(#t371, self::IntClassExtension|get#property(#t371).{core::num::-}(1){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t372 = v in #t372 == null ?{core::int*} null : self::IntClassExtension|get#property(#t372), v == null);
+static method testExplicitNullAwareIntProperties(self::IntClass? v) → dynamic {
+  core::int n0 = 0;
+  core::int n1 = 1;
+  core::int n2 = 2;
+  self::expect(n0, let final self::IntClass? #t317 = v in #t317 == null ?{core::int?} null : self::IntClassExtension|get#property(#t317{self::IntClass}), v == null);
+  self::expect(n1, let final self::IntClass? #t318 = v in #t318 == null ?{core::int?} null : let final core::int #t319 = self::IntClassExtension|get#property(#t318{self::IntClass}).{core::num::+}(n1){(core::num) → core::int} in let final void #t320 = self::IntClassExtension|set#property(#t318{self::IntClass}, #t319) in #t319, v == null);
+  self::expect(n2, let final self::IntClass? #t321 = v in #t321 == null ?{core::int?} null : let final core::int #t322 = self::IntClassExtension|get#property(#t321{self::IntClass}).{core::num::+}(n1){(core::num) → core::int} in let final void #t323 = self::IntClassExtension|set#property(#t321{self::IntClass}, #t322) in #t322, v == null);
+  self::expect(n0, let final self::IntClass? #t324 = v in #t324 == null ?{core::int?} null : let final core::int #t325 = self::IntClassExtension|get#property(#t324{self::IntClass}).{core::num::-}(n2){(core::num) → core::int} in let final void #t326 = self::IntClassExtension|set#property(#t324{self::IntClass}, #t325) in #t325, v == null);
+  self::expect(n1, let final self::IntClass? #t327 = v in #t327 == null ?{core::int?} null : let final core::int #t328 = self::IntClassExtension|get#property(#t327{self::IntClass}).{core::num::+}(n1){(core::num) → core::int} in let final void #t329 = self::IntClassExtension|set#property(#t327{self::IntClass}, #t328) in #t328, v == null);
+  self::expect(n0, let final self::IntClass? #t330 = v in #t330 == null ?{core::int?} null : let final core::int #t331 = self::IntClassExtension|get#property(#t330{self::IntClass}).{core::num::-}(n1){(core::num) → core::int} in let final void #t332 = self::IntClassExtension|set#property(#t330{self::IntClass}, #t331) in #t331, v == null);
+  self::expect(n1, let final self::IntClass? #t333 = v in #t333 == null ?{core::int?} null : let final core::int #t334 = self::IntClassExtension|get#property(#t333{self::IntClass}).{core::num::+}(1){(core::num) → core::int} in let final void #t335 = self::IntClassExtension|set#property(#t333{self::IntClass}, #t334) in #t334, v == null);
+  self::expect(n0, let final self::IntClass? #t336 = v in #t336 == null ?{core::int?} null : let final core::int #t337 = self::IntClassExtension|get#property(#t336{self::IntClass}).{core::num::-}(1){(core::num) → core::int} in let final void #t338 = self::IntClassExtension|set#property(#t336{self::IntClass}, #t337) in #t337, v == null);
+  self::expect(n0, let final self::IntClass? #t339 = v in #t339 == null ?{core::int?} null : let final core::int #t340 = self::IntClassExtension|get#property(#t339{self::IntClass}) in let final core::int #t341 = let final core::int #t342 = #t340.{core::num::+}(1){(core::num) → core::int} in let final void #t343 = self::IntClassExtension|set#property(#t339{self::IntClass}, #t342) in #t342 in #t340, v == null);
+  self::expect(n1, let final self::IntClass? #t344 = v in #t344 == null ?{core::int?} null : let final core::int #t345 = self::IntClassExtension|get#property(#t344{self::IntClass}) in let final core::int #t346 = let final core::int #t347 = #t345.{core::num::-}(1){(core::num) → core::int} in let final void #t348 = self::IntClassExtension|set#property(#t344{self::IntClass}, #t347) in #t347 in #t345, v == null);
+  self::expect(n0, let final self::IntClass? #t349 = v in #t349 == null ?{core::int?} null : self::IntClassExtension|get#property(#t349{self::IntClass}), v == null);
+  self::expect(n0, let final self::IntClass? #t350 = v in #t350 == null ?{core::int?} null : self::IntClassExtension|get#property(#t350{self::IntClass}), v == null);
+  let final self::IntClass? #t351 = v in #t351 == null ?{core::int?} null : self::IntClassExtension|set#property(#t351{self::IntClass}, self::IntClassExtension|get#property(#t351{self::IntClass}).{core::num::+}(n1){(core::num) → core::int});
+  self::expect(n1, let final self::IntClass? #t352 = v in #t352 == null ?{core::int?} null : self::IntClassExtension|get#property(#t352{self::IntClass}), v == null);
+  let final self::IntClass? #t353 = v in #t353 == null ?{core::int?} null : self::IntClassExtension|set#property(#t353{self::IntClass}, self::IntClassExtension|get#property(#t353{self::IntClass}).{core::num::+}(n1){(core::num) → core::int});
+  self::expect(n2, let final self::IntClass? #t354 = v in #t354 == null ?{core::int?} null : self::IntClassExtension|get#property(#t354{self::IntClass}), v == null);
+  let final self::IntClass? #t355 = v in #t355 == null ?{core::int?} null : self::IntClassExtension|set#property(#t355{self::IntClass}, self::IntClassExtension|get#property(#t355{self::IntClass}).{core::num::-}(n2){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass? #t356 = v in #t356 == null ?{core::int?} null : self::IntClassExtension|get#property(#t356{self::IntClass}), v == null);
+  let final self::IntClass? #t357 = v in #t357 == null ?{core::int?} null : self::IntClassExtension|set#property(#t357{self::IntClass}, self::IntClassExtension|get#property(#t357{self::IntClass}).{core::num::+}(n1){(core::num) → core::int});
+  self::expect(n1, let final self::IntClass? #t358 = v in #t358 == null ?{core::int?} null : self::IntClassExtension|get#property(#t358{self::IntClass}), v == null);
+  let final self::IntClass? #t359 = v in #t359 == null ?{core::int?} null : self::IntClassExtension|set#property(#t359{self::IntClass}, self::IntClassExtension|get#property(#t359{self::IntClass}).{core::num::-}(n1){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass? #t360 = v in #t360 == null ?{core::int?} null : self::IntClassExtension|get#property(#t360{self::IntClass}), v == null);
+  let final self::IntClass? #t361 = v in #t361 == null ?{core::int?} null : let final core::int #t362 = self::IntClassExtension|get#property(#t361{self::IntClass}).{core::num::+}(1){(core::num) → core::int} in let final void #t363 = self::IntClassExtension|set#property(#t361{self::IntClass}, #t362) in #t362;
+  self::expect(n1, let final self::IntClass? #t364 = v in #t364 == null ?{core::int?} null : self::IntClassExtension|get#property(#t364{self::IntClass}), v == null);
+  let final self::IntClass? #t365 = v in #t365 == null ?{core::int?} null : let final core::int #t366 = self::IntClassExtension|get#property(#t365{self::IntClass}).{core::num::-}(1){(core::num) → core::int} in let final void #t367 = self::IntClassExtension|set#property(#t365{self::IntClass}, #t366) in #t366;
+  self::expect(n0, let final self::IntClass? #t368 = v in #t368 == null ?{core::int?} null : self::IntClassExtension|get#property(#t368{self::IntClass}), v == null);
+  let final self::IntClass? #t369 = v in #t369 == null ?{core::int?} null : self::IntClassExtension|set#property(#t369{self::IntClass}, self::IntClassExtension|get#property(#t369{self::IntClass}).{core::num::+}(1){(core::num) → core::int});
+  self::expect(n1, let final self::IntClass? #t370 = v in #t370 == null ?{core::int?} null : self::IntClassExtension|get#property(#t370{self::IntClass}), v == null);
+  let final self::IntClass? #t371 = v in #t371 == null ?{core::int?} null : self::IntClassExtension|set#property(#t371{self::IntClass}, self::IntClassExtension|get#property(#t371{self::IntClass}).{core::num::-}(1){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass? #t372 = v in #t372 == null ?{core::int?} null : self::IntClassExtension|get#property(#t372{self::IntClass}), v == null);
 }
 static method expect(dynamic expected, dynamic actual, [dynamic expectNull = #C1]) → dynamic {
-  if(expectNull as{TypeError,ForDynamic} core::bool*) {
+  if(expectNull as{TypeError,ForDynamic,ForNonNullableByDefault} core::bool) {
     expected = null;
   }
-  if(!(expected =={core::Object::==}{(core::Object*) →* core::bool*} actual)) {
+  if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual)) {
     throw "Mismatch: expected=${expected}, actual=${actual}";
   }
 }

pkg/front_end/testcases/extensions/compounds.dart.weak.outline.expect

@@ -1,90 +1,63 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 class Number extends core::Object {
-  final field core::int* value;
-  constructor •(core::int* value) → self::Number*
+  final field core::int value;
+  constructor •(core::int value) → self::Number
     ;
-  get hashCode() → core::int*
+  get hashCode() → core::int
     ;
-  operator ==(core::Object* other) → core::bool*
+  operator ==(core::Object other) → core::bool
     ;
-  method toString() → core::String*
+  method toString() → core::String
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
 class Class extends core::Object {
-  field self::Number* field;
-  constructor •(self::Number* field) → self::Class*
+  field self::Number field;
+  constructor •(self::Number field) → self::Class
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
 class IntClass extends core::Object {
-  field core::int* field;
-  constructor •(core::int* field) → self::IntClass*
+  field core::int field;
+  constructor •(core::int field) → self::IntClass
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension NumberExtension on self::Number* {
+extension NumberExtension on self::Number {
   operator + = self::NumberExtension|+;
   operator - = self::NumberExtension|-;
 }
-extension ClassExtension on self::Class* {
+extension ClassExtension on self::Class {
   get property = self::ClassExtension|get#property;
   method testImplicitProperties = self::ClassExtension|testImplicitProperties;
   tearoff testImplicitProperties = self::ClassExtension|get#testImplicitProperties;
   set property = self::ClassExtension|set#property;
 }
-extension IntClassExtension on self::IntClass* {
+extension IntClassExtension on self::IntClass {
   get property = self::IntClassExtension|get#property;
   method testImplicitProperties = self::IntClassExtension|testImplicitProperties;
   tearoff testImplicitProperties = self::IntClassExtension|get#testImplicitProperties;
   set property = self::IntClassExtension|set#property;
 }
-static method NumberExtension|+(lowered final self::Number* #this, core::Object* other) → self::Number*
+static method NumberExtension|+(lowered final self::Number #this, core::Object other) → self::Number
   ;
-static method NumberExtension|-(lowered final self::Number* #this, core::Object* other) → self::Number*
+static method NumberExtension|-(lowered final self::Number #this, core::Object other) → self::Number
   ;
-static method ClassExtension|get#property(lowered final self::Class* #this) → self::Number*
+static method ClassExtension|get#property(lowered final self::Class #this) → self::Number
   ;
-static method ClassExtension|set#property(lowered final self::Class* #this, self::Number* value) → void
+static method ClassExtension|set#property(lowered final self::Class #this, self::Number value) → void
   ;
-static method ClassExtension|testImplicitProperties(lowered final self::Class* #this) → dynamic
+static method ClassExtension|testImplicitProperties(lowered final self::Class #this) → dynamic
   ;
-static method ClassExtension|get#testImplicitProperties(lowered final self::Class* #this) → () →* dynamic
+static method ClassExtension|get#testImplicitProperties(lowered final self::Class #this) → () → dynamic
   return () → dynamic => self::ClassExtension|testImplicitProperties(#this);
-static method IntClassExtension|get#property(lowered final self::IntClass* #this) → core::int*
+static method IntClassExtension|get#property(lowered final self::IntClass #this) → core::int
   ;
-static method IntClassExtension|set#property(lowered final self::IntClass* #this, core::int* value) → void
+static method IntClassExtension|set#property(lowered final self::IntClass #this, core::int value) → void
   ;
-static method IntClassExtension|testImplicitProperties(lowered final self::IntClass* #this) → dynamic
+static method IntClassExtension|testImplicitProperties(lowered final self::IntClass #this) → dynamic
   ;
-static method IntClassExtension|get#testImplicitProperties(lowered final self::IntClass* #this) → () →* dynamic
+static method IntClassExtension|get#testImplicitProperties(lowered final self::IntClass #this) → () → dynamic
   return () → dynamic => self::IntClassExtension|testImplicitProperties(#this);
 static method main() → dynamic
   ;
@@ -98,9 +71,9 @@ static method testExplicitProperties() → dynamic
   ;
 static method testExplicitIntProperties() → dynamic
   ;
-static method testExplicitNullAwareProperties(self::Class* v) → dynamic
+static method testExplicitNullAwareProperties(self::Class? v) → dynamic
   ;
-static method testExplicitNullAwareIntProperties(self::IntClass* v) → dynamic
+static method testExplicitNullAwareIntProperties(self::IntClass? v) → dynamic
   ;
 static method expect(dynamic expected, dynamic actual, [has-declared-initializer dynamic expectNull]) → dynamic
   ;

pkg/front_end/testcases/extensions/compounds.dart.weak.transformed.expect

@@ -1,117 +1,90 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 class Number extends core::Object {
-  final field core::int* value;
-  constructor •(core::int* value) → self::Number*
+  final field core::int value;
+  constructor •(core::int value) → self::Number
     : self::Number::value = value, super core::Object::•()
     ;
-  get hashCode() → core::int*
-    return this.{self::Number::value}{core::int*}.{core::num::hashCode}{core::int*};
-  operator ==(core::Object* other) → core::bool*
-    return other is self::Number* && this.{self::Number::value}{core::int*} =={core::num::==}{(core::Object*) →* core::bool*} other{self::Number*}.{self::Number::value}{core::int*};
-  method toString() → core::String*
-    return "Number(${this.{self::Number::value}{core::int*}})";
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
+  get hashCode() → core::int
+    return this.{self::Number::value}{core::int}.{core::num::hashCode}{core::int};
+  operator ==(core::Object other) → core::bool
+    return other is{ForNonNullableByDefault} self::Number && this.{self::Number::value}{core::int} =={core::num::==}{(core::Object) → core::bool} other{self::Number}.{self::Number::value}{core::int};
+  method toString() → core::String
+    return "Number(${this.{self::Number::value}{core::int}})";
 }
 class Class extends core::Object {
-  field self::Number* field;
-  constructor •(self::Number* field) → self::Class*
+  field self::Number field;
+  constructor •(self::Number field) → self::Class
     : self::Class::field = field, super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
 class IntClass extends core::Object {
-  field core::int* field;
-  constructor •(core::int* field) → self::IntClass*
+  field core::int field;
+  constructor •(core::int field) → self::IntClass
     : self::IntClass::field = field, super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension NumberExtension on self::Number* {
+extension NumberExtension on self::Number {
   operator + = self::NumberExtension|+;
   operator - = self::NumberExtension|-;
 }
-extension ClassExtension on self::Class* {
+extension ClassExtension on self::Class {
   get property = self::ClassExtension|get#property;
   method testImplicitProperties = self::ClassExtension|testImplicitProperties;
   tearoff testImplicitProperties = self::ClassExtension|get#testImplicitProperties;
   set property = self::ClassExtension|set#property;
 }
-extension IntClassExtension on self::IntClass* {
+extension IntClassExtension on self::IntClass {
   get property = self::IntClassExtension|get#property;
   method testImplicitProperties = self::IntClassExtension|testImplicitProperties;
   tearoff testImplicitProperties = self::IntClassExtension|get#testImplicitProperties;
   set property = self::IntClassExtension|set#property;
 }
-static method NumberExtension|+(lowered final self::Number* #this, core::Object* other) → self::Number* {
-  if(other is core::int*) {
-    return new self::Number::•(#this.{self::Number::value}{core::int*}.{core::num::+}(other{core::int*}){(core::num*) →* core::int*});
+static method NumberExtension|+(lowered final self::Number #this, core::Object other) → self::Number {
+  if(other is{ForNonNullableByDefault} core::int) {
+    return new self::Number::•(#this.{self::Number::value}{core::int}.{core::num::+}(other{core::int}){(core::num) → core::int});
   }
   else
-    if(other is self::Number*) {
-      return new self::Number::•(#this.{self::Number::value}{core::int*}.{core::num::+}(other{self::Number*}.{self::Number::value}{core::int*}){(core::num*) →* core::int*});
+    if(other is{ForNonNullableByDefault} self::Number) {
+      return new self::Number::•(#this.{self::Number::value}{core::int}.{core::num::+}(other{self::Number}.{self::Number::value}{core::int}){(core::num) → core::int});
     }
     else {
       throw new core::ArgumentError::•("${other}");
     }
 }
-static method NumberExtension|-(lowered final self::Number* #this, core::Object* other) → self::Number* {
-  if(other is core::int*) {
-    return new self::Number::•(#this.{self::Number::value}{core::int*}.{core::num::-}(other{core::int*}){(core::num*) →* core::int*});
+static method NumberExtension|-(lowered final self::Number #this, core::Object other) → self::Number {
+  if(other is{ForNonNullableByDefault} core::int) {
+    return new self::Number::•(#this.{self::Number::value}{core::int}.{core::num::-}(other{core::int}){(core::num) → core::int});
   }
   else
-    if(other is self::Number*) {
-      return new self::Number::•(#this.{self::Number::value}{core::int*}.{core::num::-}(other{self::Number*}.{self::Number::value}{core::int*}){(core::num*) →* core::int*});
+    if(other is{ForNonNullableByDefault} self::Number) {
+      return new self::Number::•(#this.{self::Number::value}{core::int}.{core::num::-}(other{self::Number}.{self::Number::value}{core::int}){(core::num) → core::int});
     }
     else {
       throw new core::ArgumentError::•("${other}");
     }
 }
-static method ClassExtension|get#property(lowered final self::Class* #this) → self::Number*
-  return #this.{self::Class::field}{self::Number*};
-static method ClassExtension|set#property(lowered final self::Class* #this, self::Number* value) → void {
+static method ClassExtension|get#property(lowered final self::Class #this) → self::Number
+  return #this.{self::Class::field}{self::Number};
+static method ClassExtension|set#property(lowered final self::Class #this, self::Number value) → void {
   #this.{self::Class::field} = value;
 }
-static method ClassExtension|testImplicitProperties(lowered final self::Class* #this) → dynamic {
-  self::Number* n0 = new self::Number::•(0);
-  self::Number* n1 = new self::Number::•(1);
-  self::Number* n2 = new self::Number::•(2);
+static method ClassExtension|testImplicitProperties(lowered final self::Class #this) → dynamic {
+  self::Number n0 = new self::Number::•(0);
+  self::Number n1 = new self::Number::•(1);
+  self::Number n2 = new self::Number::•(2);
   self::expect(n0, self::ClassExtension|get#property(#this));
-  self::expect(n1, let final self::Number* #t1 = self::NumberExtension|+(self::ClassExtension|get#property(#this), n1) in let final void #t2 = self::ClassExtension|set#property(#this, #t1) in #t1);
-  self::expect(n2, let final self::Number* #t3 = self::NumberExtension|+(self::ClassExtension|get#property(#this), n1) in let final void #t4 = self::ClassExtension|set#property(#this, #t3) in #t3);
-  self::expect(n0, let final self::Number* #t5 = self::NumberExtension|-(self::ClassExtension|get#property(#this), n2) in let final void #t6 = self::ClassExtension|set#property(#this, #t5) in #t5);
-  self::expect(n1, let final self::Number* #t7 = self::NumberExtension|+(self::ClassExtension|get#property(#this), n1) in let final void #t8 = self::ClassExtension|set#property(#this, #t7) in #t7);
-  self::expect(n0, let final self::Number* #t9 = self::NumberExtension|-(self::ClassExtension|get#property(#this), n1) in let final void #t10 = self::ClassExtension|set#property(#this, #t9) in #t9);
-  self::expect(n1, let final self::Number* #t11 = self::NumberExtension|+(self::ClassExtension|get#property(#this), 1) in let final void #t12 = self::ClassExtension|set#property(#this, #t11) in #t11);
-  self::expect(n0, let final self::Number* #t13 = self::NumberExtension|-(self::ClassExtension|get#property(#this), 1) in let final void #t14 = self::ClassExtension|set#property(#this, #t13) in #t13);
-  self::expect(n0, let final self::Number* #t15 = self::ClassExtension|get#property(#this) in let final self::Number* #t16 = self::ClassExtension|set#property(#this, self::NumberExtension|+(#t15, 1)) in #t15);
-  self::expect(n1, let final self::Number* #t17 = self::ClassExtension|get#property(#this) in let final self::Number* #t18 = self::ClassExtension|set#property(#this, self::NumberExtension|-(#t17, 1)) in #t17);
+  self::expect(n1, let final self::Number #t1 = self::NumberExtension|+(self::ClassExtension|get#property(#this), n1) in let final void #t2 = self::ClassExtension|set#property(#this, #t1) in #t1);
+  self::expect(n2, let final self::Number #t3 = self::NumberExtension|+(self::ClassExtension|get#property(#this), n1) in let final void #t4 = self::ClassExtension|set#property(#this, #t3) in #t3);
+  self::expect(n0, let final self::Number #t5 = self::NumberExtension|-(self::ClassExtension|get#property(#this), n2) in let final void #t6 = self::ClassExtension|set#property(#this, #t5) in #t5);
+  self::expect(n1, let final self::Number #t7 = self::NumberExtension|+(self::ClassExtension|get#property(#this), n1) in let final void #t8 = self::ClassExtension|set#property(#this, #t7) in #t7);
+  self::expect(n0, let final self::Number #t9 = self::NumberExtension|-(self::ClassExtension|get#property(#this), n1) in let final void #t10 = self::ClassExtension|set#property(#this, #t9) in #t9);
+  self::expect(n1, let final self::Number #t11 = self::NumberExtension|+(self::ClassExtension|get#property(#this), 1) in let final void #t12 = self::ClassExtension|set#property(#this, #t11) in #t11);
+  self::expect(n0, let final self::Number #t13 = self::NumberExtension|-(self::ClassExtension|get#property(#this), 1) in let final void #t14 = self::ClassExtension|set#property(#this, #t13) in #t13);
+  self::expect(n0, let final self::Number #t15 = self::ClassExtension|get#property(#this) in let final self::Number #t16 = self::ClassExtension|set#property(#this, self::NumberExtension|+(#t15, 1)) in #t15);
+  self::expect(n1, let final self::Number #t17 = self::ClassExtension|get#property(#this) in let final self::Number #t18 = self::ClassExtension|set#property(#this, self::NumberExtension|-(#t17, 1)) in #t17);
   self::expect(n0, self::ClassExtension|get#property(#this));
   self::expect(n0, self::ClassExtension|get#property(#this));
   self::ClassExtension|set#property(#this, self::NumberExtension|+(self::ClassExtension|get#property(#this), n1));
@@ -124,58 +97,58 @@ static method ClassExtension|testImplicitProperties(lowered final self::Class* #
   self::expect(n1, self::ClassExtension|get#property(#this));
   self::ClassExtension|set#property(#this, self::NumberExtension|-(self::ClassExtension|get#property(#this), n1));
   self::expect(n0, self::ClassExtension|get#property(#this));
-  let final self::Number* #t19 = self::NumberExtension|+(self::ClassExtension|get#property(#this), 1) in let final void #t20 = self::ClassExtension|set#property(#this, #t19) in #t19;
+  let final self::Number #t19 = self::NumberExtension|+(self::ClassExtension|get#property(#this), 1) in let final void #t20 = self::ClassExtension|set#property(#this, #t19) in #t19;
   self::expect(n1, self::ClassExtension|get#property(#this));
-  let final self::Number* #t21 = self::NumberExtension|-(self::ClassExtension|get#property(#this), 1) in let final void #t22 = self::ClassExtension|set#property(#this, #t21) in #t21;
+  let final self::Number #t21 = self::NumberExtension|-(self::ClassExtension|get#property(#this), 1) in let final void #t22 = self::ClassExtension|set#property(#this, #t21) in #t21;
   self::expect(n0, self::ClassExtension|get#property(#this));
   self::ClassExtension|set#property(#this, self::NumberExtension|+(self::ClassExtension|get#property(#this), 1));
   self::expect(n1, self::ClassExtension|get#property(#this));
   self::ClassExtension|set#property(#this, self::NumberExtension|-(self::ClassExtension|get#property(#this), 1));
   self::expect(n0, self::ClassExtension|get#property(#this));
 }
-static method ClassExtension|get#testImplicitProperties(lowered final self::Class* #this) → () →* dynamic
+static method ClassExtension|get#testImplicitProperties(lowered final self::Class #this) → () → dynamic
   return () → dynamic => self::ClassExtension|testImplicitProperties(#this);
-static method IntClassExtension|get#property(lowered final self::IntClass* #this) → core::int*
-  return #this.{self::IntClass::field}{core::int*};
-static method IntClassExtension|set#property(lowered final self::IntClass* #this, core::int* value) → void {
+static method IntClassExtension|get#property(lowered final self::IntClass #this) → core::int
+  return #this.{self::IntClass::field}{core::int};
+static method IntClassExtension|set#property(lowered final self::IntClass #this, core::int value) → void {
   #this.{self::IntClass::field} = value;
 }
-static method IntClassExtension|testImplicitProperties(lowered final self::IntClass* #this) → dynamic {
-  core::int* n0 = 0;
-  core::int* n1 = 1;
-  core::int* n2 = 2;
+static method IntClassExtension|testImplicitProperties(lowered final self::IntClass #this) → dynamic {
+  core::int n0 = 0;
+  core::int n1 = 1;
+  core::int n2 = 2;
   self::expect(n0, self::IntClassExtension|get#property(#this));
-  self::expect(n1, let final core::int* #t23 = self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t24 = self::IntClassExtension|set#property(#this, #t23) in #t23);
-  self::expect(n2, let final core::int* #t25 = self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t26 = self::IntClassExtension|set#property(#this, #t25) in #t25);
-  self::expect(n0, let final core::int* #t27 = self::IntClassExtension|get#property(#this).{core::num::-}(n2){(core::num*) →* core::int*} in let final void #t28 = self::IntClassExtension|set#property(#this, #t27) in #t27);
-  self::expect(n1, let final core::int* #t29 = self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t30 = self::IntClassExtension|set#property(#this, #t29) in #t29);
-  self::expect(n0, let final core::int* #t31 = self::IntClassExtension|get#property(#this).{core::num::-}(n1){(core::num*) →* core::int*} in let final void #t32 = self::IntClassExtension|set#property(#this, #t31) in #t31);
-  self::expect(n1, let final core::int* #t33 = self::IntClassExtension|get#property(#this).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t34 = self::IntClassExtension|set#property(#this, #t33) in #t33);
-  self::expect(n0, let final core::int* #t35 = self::IntClassExtension|get#property(#this).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t36 = self::IntClassExtension|set#property(#this, #t35) in #t35);
-  self::expect(n0, let final core::int* #t37 = self::IntClassExtension|get#property(#this) in let final core::int* #t38 = self::IntClassExtension|set#property(#this, #t37.{core::num::+}(1){(core::num*) →* core::int*}) in #t37);
-  self::expect(n1, let final core::int* #t39 = self::IntClassExtension|get#property(#this) in let final core::int* #t40 = self::IntClassExtension|set#property(#this, #t39.{core::num::-}(1){(core::num*) →* core::int*}) in #t39);
+  self::expect(n1, let final core::int #t23 = self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num) → core::int} in let final void #t24 = self::IntClassExtension|set#property(#this, #t23) in #t23);
+  self::expect(n2, let final core::int #t25 = self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num) → core::int} in let final void #t26 = self::IntClassExtension|set#property(#this, #t25) in #t25);
+  self::expect(n0, let final core::int #t27 = self::IntClassExtension|get#property(#this).{core::num::-}(n2){(core::num) → core::int} in let final void #t28 = self::IntClassExtension|set#property(#this, #t27) in #t27);
+  self::expect(n1, let final core::int #t29 = self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num) → core::int} in let final void #t30 = self::IntClassExtension|set#property(#this, #t29) in #t29);
+  self::expect(n0, let final core::int #t31 = self::IntClassExtension|get#property(#this).{core::num::-}(n1){(core::num) → core::int} in let final void #t32 = self::IntClassExtension|set#property(#this, #t31) in #t31);
+  self::expect(n1, let final core::int #t33 = self::IntClassExtension|get#property(#this).{core::num::+}(1){(core::num) → core::int} in let final void #t34 = self::IntClassExtension|set#property(#this, #t33) in #t33);
+  self::expect(n0, let final core::int #t35 = self::IntClassExtension|get#property(#this).{core::num::-}(1){(core::num) → core::int} in let final void #t36 = self::IntClassExtension|set#property(#this, #t35) in #t35);
+  self::expect(n0, let final core::int #t37 = self::IntClassExtension|get#property(#this) in let final core::int #t38 = self::IntClassExtension|set#property(#this, #t37.{core::num::+}(1){(core::num) → core::int}) in #t37);
+  self::expect(n1, let final core::int #t39 = self::IntClassExtension|get#property(#this) in let final core::int #t40 = self::IntClassExtension|set#property(#this, #t39.{core::num::-}(1){(core::num) → core::int}) in #t39);
   self::expect(n0, self::IntClassExtension|get#property(#this));
   self::expect(n0, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n2, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::-}(n2){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::-}(n2){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::-}(n1){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::-}(n1){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(#this));
-  let final core::int* #t41 = self::IntClassExtension|get#property(#this).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t42 = self::IntClassExtension|set#property(#this, #t41) in #t41;
+  let final core::int #t41 = self::IntClassExtension|get#property(#this).{core::num::+}(1){(core::num) → core::int} in let final void #t42 = self::IntClassExtension|set#property(#this, #t41) in #t41;
   self::expect(n1, self::IntClassExtension|get#property(#this));
-  let final core::int* #t43 = self::IntClassExtension|get#property(#this).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t44 = self::IntClassExtension|set#property(#this, #t43) in #t43;
+  let final core::int #t43 = self::IntClassExtension|get#property(#this).{core::num::-}(1){(core::num) → core::int} in let final void #t44 = self::IntClassExtension|set#property(#this, #t43) in #t43;
   self::expect(n0, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(1){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::+}(1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(#this));
-  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::-}(1){(core::num*) →* core::int*});
+  self::IntClassExtension|set#property(#this, self::IntClassExtension|get#property(#this).{core::num::-}(1){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(#this));
 }
-static method IntClassExtension|get#testImplicitProperties(lowered final self::IntClass* #this) → () →* dynamic
+static method IntClassExtension|get#testImplicitProperties(lowered final self::IntClass #this) → () → dynamic
   return () → dynamic => self::IntClassExtension|testImplicitProperties(#this);
 static method main() → dynamic {
   self::testLocals();
@@ -191,10 +164,10 @@ static method main() → dynamic {
   self::IntClassExtension|testImplicitProperties(new self::IntClass::•(0));
 }
 static method testLocals() → dynamic {
-  self::Number* n0 = new self::Number::•(0);
-  self::Number* n1 = new self::Number::•(1);
-  self::Number* n2 = new self::Number::•(2);
-  self::Number* v = n0;
+  self::Number n0 = new self::Number::•(0);
+  self::Number n1 = new self::Number::•(1);
+  self::Number n2 = new self::Number::•(2);
+  self::Number v = n0;
   self::expect(n0, v);
   self::expect(n1, v = self::NumberExtension|+(v, n1));
   self::expect(n2, v = self::NumberExtension|+(v, n1));
@@ -203,8 +176,8 @@ static method testLocals() → dynamic {
   self::expect(n0, v = self::NumberExtension|-(v, n1));
   self::expect(n1, v = self::NumberExtension|+(v, 1));
   self::expect(n0, v = self::NumberExtension|-(v, 1));
-  self::expect(n0, let final self::Number* #t45 = v in let final self::Number* #t46 = v = self::NumberExtension|+(#t45, 1) in #t45);
-  self::expect(n1, let final self::Number* #t47 = v in let final self::Number* #t48 = v = self::NumberExtension|-(#t47, 1) in #t47);
+  self::expect(n0, let final self::Number #t45 = v in let final self::Number #t46 = v = self::NumberExtension|+(#t45, 1) in #t45);
+  self::expect(n1, let final self::Number #t47 = v in let final self::Number #t48 = v = self::NumberExtension|-(#t47, 1) in #t47);
   self::expect(n0, v);
   self::expect(n0, v);
   v = self::NumberExtension|+(v, n1);
@@ -227,284 +200,284 @@ static method testLocals() → dynamic {
   self::expect(n0, v);
 }
 static method testProperties() → dynamic {
-  self::Number* n0 = new self::Number::•(0);
-  self::Number* n1 = new self::Number::•(1);
-  self::Number* n2 = new self::Number::•(2);
-  self::Class* v = new self::Class::•(n0);
-  self::expect(n0, v.{self::Class::field}{self::Number*});
-  self::expect(n1, let final self::Class* #t49 = v in #t49.{self::Class::field} = self::NumberExtension|+(#t49.{self::Class::field}{self::Number*}, n1));
-  self::expect(n2, let final self::Class* #t50 = v in #t50.{self::Class::field} = self::NumberExtension|+(#t50.{self::Class::field}{self::Number*}, n1));
-  self::expect(n0, let final self::Class* #t51 = v in #t51.{self::Class::field} = self::NumberExtension|-(#t51.{self::Class::field}{self::Number*}, n2));
-  self::expect(n1, let final self::Class* #t52 = v in #t52.{self::Class::field} = self::NumberExtension|+(#t52.{self::Class::field}{self::Number*}, n1));
-  self::expect(n0, let final self::Class* #t53 = v in #t53.{self::Class::field} = self::NumberExtension|-(#t53.{self::Class::field}{self::Number*}, n1));
-  self::expect(n1, let final self::Class* #t54 = v in #t54.{self::Class::field} = self::NumberExtension|+(#t54.{self::Class::field}{self::Number*}, 1));
-  self::expect(n0, let final self::Class* #t55 = v in #t55.{self::Class::field} = self::NumberExtension|-(#t55.{self::Class::field}{self::Number*}, 1));
-  self::expect(n0, let final self::Class* #t56 = v in let final self::Number* #t57 = #t56.{self::Class::field}{self::Number*} in let final self::Number* #t58 = #t56.{self::Class::field} = self::NumberExtension|+(#t57, 1) in #t57);
-  self::expect(n1, let final self::Class* #t59 = v in let final self::Number* #t60 = #t59.{self::Class::field}{self::Number*} in let final self::Number* #t61 = #t59.{self::Class::field} = self::NumberExtension|-(#t60, 1) in #t60);
-  self::expect(n0, v.{self::Class::field}{self::Number*});
-  self::expect(n0, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t62 = v in #t62.{self::Class::field} = self::NumberExtension|+(#t62.{self::Class::field}{self::Number*}, n1);
-  self::expect(n1, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t63 = v in #t63.{self::Class::field} = self::NumberExtension|+(#t63.{self::Class::field}{self::Number*}, n1);
-  self::expect(n2, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t64 = v in #t64.{self::Class::field} = self::NumberExtension|-(#t64.{self::Class::field}{self::Number*}, n2);
-  self::expect(n0, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t65 = v in #t65.{self::Class::field} = self::NumberExtension|+(#t65.{self::Class::field}{self::Number*}, n1);
-  self::expect(n1, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t66 = v in #t66.{self::Class::field} = self::NumberExtension|-(#t66.{self::Class::field}{self::Number*}, n1);
-  self::expect(n0, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t67 = v in #t67.{self::Class::field} = self::NumberExtension|+(#t67.{self::Class::field}{self::Number*}, 1);
-  self::expect(n1, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t68 = v in #t68.{self::Class::field} = self::NumberExtension|-(#t68.{self::Class::field}{self::Number*}, 1);
-  self::expect(n0, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t69 = v in #t69.{self::Class::field} = self::NumberExtension|+(#t69.{self::Class::field}{self::Number*}, 1);
-  self::expect(n1, v.{self::Class::field}{self::Number*});
-  let final self::Class* #t70 = v in #t70.{self::Class::field} = self::NumberExtension|-(#t70.{self::Class::field}{self::Number*}, 1);
-  self::expect(n0, v.{self::Class::field}{self::Number*});
+  self::Number n0 = new self::Number::•(0);
+  self::Number n1 = new self::Number::•(1);
+  self::Number n2 = new self::Number::•(2);
+  self::Class v = new self::Class::•(n0);
+  self::expect(n0, v.{self::Class::field}{self::Number});
+  self::expect(n1, let final self::Class #t49 = v in #t49.{self::Class::field} = self::NumberExtension|+(#t49.{self::Class::field}{self::Number}, n1));
+  self::expect(n2, let final self::Class #t50 = v in #t50.{self::Class::field} = self::NumberExtension|+(#t50.{self::Class::field}{self::Number}, n1));
+  self::expect(n0, let final self::Class #t51 = v in #t51.{self::Class::field} = self::NumberExtension|-(#t51.{self::Class::field}{self::Number}, n2));
+  self::expect(n1, let final self::Class #t52 = v in #t52.{self::Class::field} = self::NumberExtension|+(#t52.{self::Class::field}{self::Number}, n1));
+  self::expect(n0, let final self::Class #t53 = v in #t53.{self::Class::field} = self::NumberExtension|-(#t53.{self::Class::field}{self::Number}, n1));
+  self::expect(n1, let final self::Class #t54 = v in #t54.{self::Class::field} = self::NumberExtension|+(#t54.{self::Class::field}{self::Number}, 1));
+  self::expect(n0, let final self::Class #t55 = v in #t55.{self::Class::field} = self::NumberExtension|-(#t55.{self::Class::field}{self::Number}, 1));
+  self::expect(n0, let final self::Class #t56 = v in let final self::Number #t57 = #t56.{self::Class::field}{self::Number} in let final self::Number #t58 = #t56.{self::Class::field} = self::NumberExtension|+(#t57, 1) in #t57);
+  self::expect(n1, let final self::Class #t59 = v in let final self::Number #t60 = #t59.{self::Class::field}{self::Number} in let final self::Number #t61 = #t59.{self::Class::field} = self::NumberExtension|-(#t60, 1) in #t60);
+  self::expect(n0, v.{self::Class::field}{self::Number});
+  self::expect(n0, v.{self::Class::field}{self::Number});
+  let final self::Class #t62 = v in #t62.{self::Class::field} = self::NumberExtension|+(#t62.{self::Class::field}{self::Number}, n1);
+  self::expect(n1, v.{self::Class::field}{self::Number});
+  let final self::Class #t63 = v in #t63.{self::Class::field} = self::NumberExtension|+(#t63.{self::Class::field}{self::Number}, n1);
+  self::expect(n2, v.{self::Class::field}{self::Number});
+  let final self::Class #t64 = v in #t64.{self::Class::field} = self::NumberExtension|-(#t64.{self::Class::field}{self::Number}, n2);
+  self::expect(n0, v.{self::Class::field}{self::Number});
+  let final self::Class #t65 = v in #t65.{self::Class::field} = self::NumberExtension|+(#t65.{self::Class::field}{self::Number}, n1);
+  self::expect(n1, v.{self::Class::field}{self::Number});
+  let final self::Class #t66 = v in #t66.{self::Class::field} = self::NumberExtension|-(#t66.{self::Class::field}{self::Number}, n1);
+  self::expect(n0, v.{self::Class::field}{self::Number});
+  let final self::Class #t67 = v in #t67.{self::Class::field} = self::NumberExtension|+(#t67.{self::Class::field}{self::Number}, 1);
+  self::expect(n1, v.{self::Class::field}{self::Number});
+  let final self::Class #t68 = v in #t68.{self::Class::field} = self::NumberExtension|-(#t68.{self::Class::field}{self::Number}, 1);
+  self::expect(n0, v.{self::Class::field}{self::Number});
+  let final self::Class #t69 = v in #t69.{self::Class::field} = self::NumberExtension|+(#t69.{self::Class::field}{self::Number}, 1);
+  self::expect(n1, v.{self::Class::field}{self::Number});
+  let final self::Class #t70 = v in #t70.{self::Class::field} = self::NumberExtension|-(#t70.{self::Class::field}{self::Number}, 1);
+  self::expect(n0, v.{self::Class::field}{self::Number});
   self::expect(n0, self::ClassExtension|get#property(v));
-  self::expect(n1, let final self::Class* #t71 = v in let final self::Number* #t72 = self::NumberExtension|+(self::ClassExtension|get#property(#t71), n1) in let final void #t73 = self::ClassExtension|set#property(#t71, #t72) in #t72);
-  self::expect(n2, let final self::Class* #t74 = v in let final self::Number* #t75 = self::NumberExtension|+(self::ClassExtension|get#property(#t74), n1) in let final void #t76 = self::ClassExtension|set#property(#t74, #t75) in #t75);
-  self::expect(n0, let final self::Class* #t77 = v in let final self::Number* #t78 = self::NumberExtension|-(self::ClassExtension|get#property(#t77), n2) in let final void #t79 = self::ClassExtension|set#property(#t77, #t78) in #t78);
-  self::expect(n1, let final self::Class* #t80 = v in let final self::Number* #t81 = self::NumberExtension|+(self::ClassExtension|get#property(#t80), n1) in let final void #t82 = self::ClassExtension|set#property(#t80, #t81) in #t81);
-  self::expect(n0, let final self::Class* #t83 = v in let final self::Number* #t84 = self::NumberExtension|-(self::ClassExtension|get#property(#t83), n1) in let final void #t85 = self::ClassExtension|set#property(#t83, #t84) in #t84);
-  self::expect(n1, let final self::Class* #t86 = v in let final self::Number* #t87 = self::NumberExtension|+(self::ClassExtension|get#property(#t86), 1) in let final void #t88 = self::ClassExtension|set#property(#t86, #t87) in #t87);
-  self::expect(n0, let final self::Class* #t89 = v in let final self::Number* #t90 = self::NumberExtension|-(self::ClassExtension|get#property(#t89), 1) in let final void #t91 = self::ClassExtension|set#property(#t89, #t90) in #t90);
-  self::expect(n0, let final self::Class* #t92 = v in let final self::Number* #t93 = self::ClassExtension|get#property(#t92) in let final self::Number* #t94 = self::ClassExtension|set#property(#t92, self::NumberExtension|+(#t93, 1)) in #t93);
-  self::expect(n1, let final self::Class* #t95 = v in let final self::Number* #t96 = self::ClassExtension|get#property(#t95) in let final self::Number* #t97 = self::ClassExtension|set#property(#t95, self::NumberExtension|-(#t96, 1)) in #t96);
+  self::expect(n1, let final self::Class #t71 = v in let final self::Number #t72 = self::NumberExtension|+(self::ClassExtension|get#property(#t71), n1) in let final void #t73 = self::ClassExtension|set#property(#t71, #t72) in #t72);
+  self::expect(n2, let final self::Class #t74 = v in let final self::Number #t75 = self::NumberExtension|+(self::ClassExtension|get#property(#t74), n1) in let final void #t76 = self::ClassExtension|set#property(#t74, #t75) in #t75);
+  self::expect(n0, let final self::Class #t77 = v in let final self::Number #t78 = self::NumberExtension|-(self::ClassExtension|get#property(#t77), n2) in let final void #t79 = self::ClassExtension|set#property(#t77, #t78) in #t78);
+  self::expect(n1, let final self::Class #t80 = v in let final self::Number #t81 = self::NumberExtension|+(self::ClassExtension|get#property(#t80), n1) in let final void #t82 = self::ClassExtension|set#property(#t80, #t81) in #t81);
+  self::expect(n0, let final self::Class #t83 = v in let final self::Number #t84 = self::NumberExtension|-(self::ClassExtension|get#property(#t83), n1) in let final void #t85 = self::ClassExtension|set#property(#t83, #t84) in #t84);
+  self::expect(n1, let final self::Class #t86 = v in let final self::Number #t87 = self::NumberExtension|+(self::ClassExtension|get#property(#t86), 1) in let final void #t88 = self::ClassExtension|set#property(#t86, #t87) in #t87);
+  self::expect(n0, let final self::Class #t89 = v in let final self::Number #t90 = self::NumberExtension|-(self::ClassExtension|get#property(#t89), 1) in let final void #t91 = self::ClassExtension|set#property(#t89, #t90) in #t90);
+  self::expect(n0, let final self::Class #t92 = v in let final self::Number #t93 = self::ClassExtension|get#property(#t92) in let final self::Number #t94 = self::ClassExtension|set#property(#t92, self::NumberExtension|+(#t93, 1)) in #t93);
+  self::expect(n1, let final self::Class #t95 = v in let final self::Number #t96 = self::ClassExtension|get#property(#t95) in let final self::Number #t97 = self::ClassExtension|set#property(#t95, self::NumberExtension|-(#t96, 1)) in #t96);
   self::expect(n0, self::ClassExtension|get#property(v));
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t98 = v in self::ClassExtension|set#property(#t98, self::NumberExtension|+(self::ClassExtension|get#property(#t98), n1));
+  let final self::Class #t98 = v in self::ClassExtension|set#property(#t98, self::NumberExtension|+(self::ClassExtension|get#property(#t98), n1));
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t99 = v in self::ClassExtension|set#property(#t99, self::NumberExtension|+(self::ClassExtension|get#property(#t99), n1));
+  let final self::Class #t99 = v in self::ClassExtension|set#property(#t99, self::NumberExtension|+(self::ClassExtension|get#property(#t99), n1));
   self::expect(n2, self::ClassExtension|get#property(v));
-  let final self::Class* #t100 = v in self::ClassExtension|set#property(#t100, self::NumberExtension|-(self::ClassExtension|get#property(#t100), n2));
+  let final self::Class #t100 = v in self::ClassExtension|set#property(#t100, self::NumberExtension|-(self::ClassExtension|get#property(#t100), n2));
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t101 = v in self::ClassExtension|set#property(#t101, self::NumberExtension|+(self::ClassExtension|get#property(#t101), n1));
+  let final self::Class #t101 = v in self::ClassExtension|set#property(#t101, self::NumberExtension|+(self::ClassExtension|get#property(#t101), n1));
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t102 = v in self::ClassExtension|set#property(#t102, self::NumberExtension|-(self::ClassExtension|get#property(#t102), n1));
+  let final self::Class #t102 = v in self::ClassExtension|set#property(#t102, self::NumberExtension|-(self::ClassExtension|get#property(#t102), n1));
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t103 = v in let final self::Number* #t104 = self::NumberExtension|+(self::ClassExtension|get#property(#t103), 1) in let final void #t105 = self::ClassExtension|set#property(#t103, #t104) in #t104;
+  let final self::Class #t103 = v in let final self::Number #t104 = self::NumberExtension|+(self::ClassExtension|get#property(#t103), 1) in let final void #t105 = self::ClassExtension|set#property(#t103, #t104) in #t104;
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t106 = v in let final self::Number* #t107 = self::NumberExtension|-(self::ClassExtension|get#property(#t106), 1) in let final void #t108 = self::ClassExtension|set#property(#t106, #t107) in #t107;
+  let final self::Class #t106 = v in let final self::Number #t107 = self::NumberExtension|-(self::ClassExtension|get#property(#t106), 1) in let final void #t108 = self::ClassExtension|set#property(#t106, #t107) in #t107;
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t109 = v in self::ClassExtension|set#property(#t109, self::NumberExtension|+(self::ClassExtension|get#property(#t109), 1));
+  let final self::Class #t109 = v in self::ClassExtension|set#property(#t109, self::NumberExtension|+(self::ClassExtension|get#property(#t109), 1));
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t110 = v in self::ClassExtension|set#property(#t110, self::NumberExtension|-(self::ClassExtension|get#property(#t110), 1));
+  let final self::Class #t110 = v in self::ClassExtension|set#property(#t110, self::NumberExtension|-(self::ClassExtension|get#property(#t110), 1));
   self::expect(n0, self::ClassExtension|get#property(v));
 }
 static method testIntProperties() → dynamic {
-  core::int* n0 = 0;
-  core::int* n1 = 1;
-  core::int* n2 = 2;
-  self::IntClass* v = new self::IntClass::•(n0);
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
-  self::expect(n1, let final self::IntClass* #t111 = v in #t111.{self::IntClass::field} = #t111.{self::IntClass::field}{core::int*}.{core::num::+}(n1){(core::num*) →* core::int*});
-  self::expect(n2, let final self::IntClass* #t112 = v in #t112.{self::IntClass::field} = #t112.{self::IntClass::field}{core::int*}.{core::num::+}(n1){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t113 = v in #t113.{self::IntClass::field} = #t113.{self::IntClass::field}{core::int*}.{core::num::-}(n2){(core::num*) →* core::int*});
-  self::expect(n1, let final self::IntClass* #t114 = v in #t114.{self::IntClass::field} = #t114.{self::IntClass::field}{core::int*}.{core::num::+}(n1){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t115 = v in #t115.{self::IntClass::field} = #t115.{self::IntClass::field}{core::int*}.{core::num::-}(n1){(core::num*) →* core::int*});
-  self::expect(n1, let final self::IntClass* #t116 = v in #t116.{self::IntClass::field} = #t116.{self::IntClass::field}{core::int*}.{core::num::+}(1){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t117 = v in #t117.{self::IntClass::field} = #t117.{self::IntClass::field}{core::int*}.{core::num::-}(1){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t118 = v in let final core::int* #t119 = #t118.{self::IntClass::field}{core::int*} in let final core::int* #t120 = #t118.{self::IntClass::field} = #t119.{core::num::+}(1){(core::num*) →* core::int*} in #t119);
-  self::expect(n1, let final self::IntClass* #t121 = v in let final core::int* #t122 = #t121.{self::IntClass::field}{core::int*} in let final core::int* #t123 = #t121.{self::IntClass::field} = #t122.{core::num::-}(1){(core::num*) →* core::int*} in #t122);
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t124 = v in #t124.{self::IntClass::field} = #t124.{self::IntClass::field}{core::int*}.{core::num::+}(n1){(core::num*) →* core::int*};
-  self::expect(n1, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t125 = v in #t125.{self::IntClass::field} = #t125.{self::IntClass::field}{core::int*}.{core::num::+}(n1){(core::num*) →* core::int*};
-  self::expect(n2, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t126 = v in #t126.{self::IntClass::field} = #t126.{self::IntClass::field}{core::int*}.{core::num::-}(n2){(core::num*) →* core::int*};
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t127 = v in #t127.{self::IntClass::field} = #t127.{self::IntClass::field}{core::int*}.{core::num::+}(n1){(core::num*) →* core::int*};
-  self::expect(n1, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t128 = v in #t128.{self::IntClass::field} = #t128.{self::IntClass::field}{core::int*}.{core::num::-}(n1){(core::num*) →* core::int*};
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t129 = v in #t129.{self::IntClass::field} = #t129.{self::IntClass::field}{core::int*}.{core::num::+}(1){(core::num*) →* core::int*};
-  self::expect(n1, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t130 = v in #t130.{self::IntClass::field} = #t130.{self::IntClass::field}{core::int*}.{core::num::-}(1){(core::num*) →* core::int*};
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t131 = v in #t131.{self::IntClass::field} = #t131.{self::IntClass::field}{core::int*}.{core::num::+}(1){(core::num*) →* core::int*};
-  self::expect(n1, v.{self::IntClass::field}{core::int*});
-  let final self::IntClass* #t132 = v in #t132.{self::IntClass::field} = #t132.{self::IntClass::field}{core::int*}.{core::num::-}(1){(core::num*) →* core::int*};
-  self::expect(n0, v.{self::IntClass::field}{core::int*});
+  core::int n0 = 0;
+  core::int n1 = 1;
+  core::int n2 = 2;
+  self::IntClass v = new self::IntClass::•(n0);
+  self::expect(n0, v.{self::IntClass::field}{core::int});
+  self::expect(n1, let final self::IntClass #t111 = v in #t111.{self::IntClass::field} = #t111.{self::IntClass::field}{core::int}.{core::num::+}(n1){(core::num) → core::int});
+  self::expect(n2, let final self::IntClass #t112 = v in #t112.{self::IntClass::field} = #t112.{self::IntClass::field}{core::int}.{core::num::+}(n1){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass #t113 = v in #t113.{self::IntClass::field} = #t113.{self::IntClass::field}{core::int}.{core::num::-}(n2){(core::num) → core::int});
+  self::expect(n1, let final self::IntClass #t114 = v in #t114.{self::IntClass::field} = #t114.{self::IntClass::field}{core::int}.{core::num::+}(n1){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass #t115 = v in #t115.{self::IntClass::field} = #t115.{self::IntClass::field}{core::int}.{core::num::-}(n1){(core::num) → core::int});
+  self::expect(n1, let final self::IntClass #t116 = v in #t116.{self::IntClass::field} = #t116.{self::IntClass::field}{core::int}.{core::num::+}(1){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass #t117 = v in #t117.{self::IntClass::field} = #t117.{self::IntClass::field}{core::int}.{core::num::-}(1){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass #t118 = v in let final core::int #t119 = #t118.{self::IntClass::field}{core::int} in let final core::int #t120 = #t118.{self::IntClass::field} = #t119.{core::num::+}(1){(core::num) → core::int} in #t119);
+  self::expect(n1, let final self::IntClass #t121 = v in let final core::int #t122 = #t121.{self::IntClass::field}{core::int} in let final core::int #t123 = #t121.{self::IntClass::field} = #t122.{core::num::-}(1){(core::num) → core::int} in #t122);
+  self::expect(n0, v.{self::IntClass::field}{core::int});
+  self::expect(n0, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t124 = v in #t124.{self::IntClass::field} = #t124.{self::IntClass::field}{core::int}.{core::num::+}(n1){(core::num) → core::int};
+  self::expect(n1, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t125 = v in #t125.{self::IntClass::field} = #t125.{self::IntClass::field}{core::int}.{core::num::+}(n1){(core::num) → core::int};
+  self::expect(n2, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t126 = v in #t126.{self::IntClass::field} = #t126.{self::IntClass::field}{core::int}.{core::num::-}(n2){(core::num) → core::int};
+  self::expect(n0, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t127 = v in #t127.{self::IntClass::field} = #t127.{self::IntClass::field}{core::int}.{core::num::+}(n1){(core::num) → core::int};
+  self::expect(n1, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t128 = v in #t128.{self::IntClass::field} = #t128.{self::IntClass::field}{core::int}.{core::num::-}(n1){(core::num) → core::int};
+  self::expect(n0, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t129 = v in #t129.{self::IntClass::field} = #t129.{self::IntClass::field}{core::int}.{core::num::+}(1){(core::num) → core::int};
+  self::expect(n1, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t130 = v in #t130.{self::IntClass::field} = #t130.{self::IntClass::field}{core::int}.{core::num::-}(1){(core::num) → core::int};
+  self::expect(n0, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t131 = v in #t131.{self::IntClass::field} = #t131.{self::IntClass::field}{core::int}.{core::num::+}(1){(core::num) → core::int};
+  self::expect(n1, v.{self::IntClass::field}{core::int});
+  let final self::IntClass #t132 = v in #t132.{self::IntClass::field} = #t132.{self::IntClass::field}{core::int}.{core::num::-}(1){(core::num) → core::int};
+  self::expect(n0, v.{self::IntClass::field}{core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
-  self::expect(n1, let final self::IntClass* #t133 = v in let final core::int* #t134 = self::IntClassExtension|get#property(#t133).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t135 = self::IntClassExtension|set#property(#t133, #t134) in #t134);
-  self::expect(n2, let final self::IntClass* #t136 = v in let final core::int* #t137 = self::IntClassExtension|get#property(#t136).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t138 = self::IntClassExtension|set#property(#t136, #t137) in #t137);
-  self::expect(n0, let final self::IntClass* #t139 = v in let final core::int* #t140 = self::IntClassExtension|get#property(#t139).{core::num::-}(n2){(core::num*) →* core::int*} in let final void #t141 = self::IntClassExtension|set#property(#t139, #t140) in #t140);
-  self::expect(n1, let final self::IntClass* #t142 = v in let final core::int* #t143 = self::IntClassExtension|get#property(#t142).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t144 = self::IntClassExtension|set#property(#t142, #t143) in #t143);
-  self::expect(n0, let final self::IntClass* #t145 = v in let final core::int* #t146 = self::IntClassExtension|get#property(#t145).{core::num::-}(n1){(core::num*) →* core::int*} in let final void #t147 = self::IntClassExtension|set#property(#t145, #t146) in #t146);
-  self::expect(n1, let final self::IntClass* #t148 = v in let final core::int* #t149 = self::IntClassExtension|get#property(#t148).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t150 = self::IntClassExtension|set#property(#t148, #t149) in #t149);
-  self::expect(n0, let final self::IntClass* #t151 = v in let final core::int* #t152 = self::IntClassExtension|get#property(#t151).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t153 = self::IntClassExtension|set#property(#t151, #t152) in #t152);
-  self::expect(n0, let final self::IntClass* #t154 = v in let final core::int* #t155 = self::IntClassExtension|get#property(#t154) in let final core::int* #t156 = self::IntClassExtension|set#property(#t154, #t155.{core::num::+}(1){(core::num*) →* core::int*}) in #t155);
-  self::expect(n1, let final self::IntClass* #t157 = v in let final core::int* #t158 = self::IntClassExtension|get#property(#t157) in let final core::int* #t159 = self::IntClassExtension|set#property(#t157, #t158.{core::num::-}(1){(core::num*) →* core::int*}) in #t158);
+  self::expect(n1, let final self::IntClass #t133 = v in let final core::int #t134 = self::IntClassExtension|get#property(#t133).{core::num::+}(n1){(core::num) → core::int} in let final void #t135 = self::IntClassExtension|set#property(#t133, #t134) in #t134);
+  self::expect(n2, let final self::IntClass #t136 = v in let final core::int #t137 = self::IntClassExtension|get#property(#t136).{core::num::+}(n1){(core::num) → core::int} in let final void #t138 = self::IntClassExtension|set#property(#t136, #t137) in #t137);
+  self::expect(n0, let final self::IntClass #t139 = v in let final core::int #t140 = self::IntClassExtension|get#property(#t139).{core::num::-}(n2){(core::num) → core::int} in let final void #t141 = self::IntClassExtension|set#property(#t139, #t140) in #t140);
+  self::expect(n1, let final self::IntClass #t142 = v in let final core::int #t143 = self::IntClassExtension|get#property(#t142).{core::num::+}(n1){(core::num) → core::int} in let final void #t144 = self::IntClassExtension|set#property(#t142, #t143) in #t143);
+  self::expect(n0, let final self::IntClass #t145 = v in let final core::int #t146 = self::IntClassExtension|get#property(#t145).{core::num::-}(n1){(core::num) → core::int} in let final void #t147 = self::IntClassExtension|set#property(#t145, #t146) in #t146);
+  self::expect(n1, let final self::IntClass #t148 = v in let final core::int #t149 = self::IntClassExtension|get#property(#t148).{core::num::+}(1){(core::num) → core::int} in let final void #t150 = self::IntClassExtension|set#property(#t148, #t149) in #t149);
+  self::expect(n0, let final self::IntClass #t151 = v in let final core::int #t152 = self::IntClassExtension|get#property(#t151).{core::num::-}(1){(core::num) → core::int} in let final void #t153 = self::IntClassExtension|set#property(#t151, #t152) in #t152);
+  self::expect(n0, let final self::IntClass #t154 = v in let final core::int #t155 = self::IntClassExtension|get#property(#t154) in let final core::int #t156 = self::IntClassExtension|set#property(#t154, #t155.{core::num::+}(1){(core::num) → core::int}) in #t155);
+  self::expect(n1, let final self::IntClass #t157 = v in let final core::int #t158 = self::IntClassExtension|get#property(#t157) in let final core::int #t159 = self::IntClassExtension|set#property(#t157, #t158.{core::num::-}(1){(core::num) → core::int}) in #t158);
   self::expect(n0, self::IntClassExtension|get#property(v));
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t160 = v in self::IntClassExtension|set#property(#t160, self::IntClassExtension|get#property(#t160).{core::num::+}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t160 = v in self::IntClassExtension|set#property(#t160, self::IntClassExtension|get#property(#t160).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t161 = v in self::IntClassExtension|set#property(#t161, self::IntClassExtension|get#property(#t161).{core::num::+}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t161 = v in self::IntClassExtension|set#property(#t161, self::IntClassExtension|get#property(#t161).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n2, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t162 = v in self::IntClassExtension|set#property(#t162, self::IntClassExtension|get#property(#t162).{core::num::-}(n2){(core::num*) →* core::int*});
+  let final self::IntClass #t162 = v in self::IntClassExtension|set#property(#t162, self::IntClassExtension|get#property(#t162).{core::num::-}(n2){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t163 = v in self::IntClassExtension|set#property(#t163, self::IntClassExtension|get#property(#t163).{core::num::+}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t163 = v in self::IntClassExtension|set#property(#t163, self::IntClassExtension|get#property(#t163).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t164 = v in self::IntClassExtension|set#property(#t164, self::IntClassExtension|get#property(#t164).{core::num::-}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t164 = v in self::IntClassExtension|set#property(#t164, self::IntClassExtension|get#property(#t164).{core::num::-}(n1){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t165 = v in let final core::int* #t166 = self::IntClassExtension|get#property(#t165).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t167 = self::IntClassExtension|set#property(#t165, #t166) in #t166;
+  let final self::IntClass #t165 = v in let final core::int #t166 = self::IntClassExtension|get#property(#t165).{core::num::+}(1){(core::num) → core::int} in let final void #t167 = self::IntClassExtension|set#property(#t165, #t166) in #t166;
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t168 = v in let final core::int* #t169 = self::IntClassExtension|get#property(#t168).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t170 = self::IntClassExtension|set#property(#t168, #t169) in #t169;
+  let final self::IntClass #t168 = v in let final core::int #t169 = self::IntClassExtension|get#property(#t168).{core::num::-}(1){(core::num) → core::int} in let final void #t170 = self::IntClassExtension|set#property(#t168, #t169) in #t169;
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t171 = v in self::IntClassExtension|set#property(#t171, self::IntClassExtension|get#property(#t171).{core::num::+}(1){(core::num*) →* core::int*});
+  let final self::IntClass #t171 = v in self::IntClassExtension|set#property(#t171, self::IntClassExtension|get#property(#t171).{core::num::+}(1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t172 = v in self::IntClassExtension|set#property(#t172, self::IntClassExtension|get#property(#t172).{core::num::-}(1){(core::num*) →* core::int*});
+  let final self::IntClass #t172 = v in self::IntClassExtension|set#property(#t172, self::IntClassExtension|get#property(#t172).{core::num::-}(1){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
 }
 static method testExplicitProperties() → dynamic {
-  self::Number* n0 = new self::Number::•(0);
-  self::Number* n1 = new self::Number::•(1);
-  self::Number* n2 = new self::Number::•(2);
-  self::Class* v = new self::Class::•(n0);
+  self::Number n0 = new self::Number::•(0);
+  self::Number n1 = new self::Number::•(1);
+  self::Number n2 = new self::Number::•(2);
+  self::Class v = new self::Class::•(n0);
   self::expect(n0, self::ClassExtension|get#property(v));
-  self::expect(n1, let final self::Class* #t173 = v in let final self::Number* #t174 = self::NumberExtension|+(self::ClassExtension|get#property(#t173), n1) in let final void #t175 = self::ClassExtension|set#property(#t173, #t174) in #t174);
-  self::expect(n2, let final self::Class* #t176 = v in let final self::Number* #t177 = self::NumberExtension|+(self::ClassExtension|get#property(#t176), n1) in let final void #t178 = self::ClassExtension|set#property(#t176, #t177) in #t177);
-  self::expect(n0, let final self::Class* #t179 = v in let final self::Number* #t180 = self::NumberExtension|-(self::ClassExtension|get#property(#t179), n2) in let final void #t181 = self::ClassExtension|set#property(#t179, #t180) in #t180);
-  self::expect(n1, let final self::Class* #t182 = v in let final self::Number* #t183 = self::NumberExtension|+(self::ClassExtension|get#property(#t182), n1) in let final void #t184 = self::ClassExtension|set#property(#t182, #t183) in #t183);
-  self::expect(n0, let final self::Class* #t185 = v in let final self::Number* #t186 = self::NumberExtension|-(self::ClassExtension|get#property(#t185), n1) in let final void #t187 = self::ClassExtension|set#property(#t185, #t186) in #t186);
-  self::expect(n1, let final self::Class* #t188 = v in let final self::Number* #t189 = self::NumberExtension|+(self::ClassExtension|get#property(#t188), 1) in let final void #t190 = self::ClassExtension|set#property(#t188, #t189) in #t189);
-  self::expect(n0, let final self::Class* #t191 = v in let final self::Number* #t192 = self::NumberExtension|-(self::ClassExtension|get#property(#t191), 1) in let final void #t193 = self::ClassExtension|set#property(#t191, #t192) in #t192);
-  self::expect(n0, let final self::Class* #t194 = v in let final self::Number* #t195 = self::ClassExtension|get#property(#t194) in let final self::Number* #t196 = let final self::Number* #t197 = self::NumberExtension|+(#t195, 1) in let final void #t198 = self::ClassExtension|set#property(#t194, #t197) in #t197 in #t195);
-  self::expect(n1, let final self::Class* #t199 = v in let final self::Number* #t200 = self::ClassExtension|get#property(#t199) in let final self::Number* #t201 = let final self::Number* #t202 = self::NumberExtension|-(#t200, 1) in let final void #t203 = self::ClassExtension|set#property(#t199, #t202) in #t202 in #t200);
+  self::expect(n1, let final self::Class #t173 = v in let final self::Number #t174 = self::NumberExtension|+(self::ClassExtension|get#property(#t173), n1) in let final void #t175 = self::ClassExtension|set#property(#t173, #t174) in #t174);
+  self::expect(n2, let final self::Class #t176 = v in let final self::Number #t177 = self::NumberExtension|+(self::ClassExtension|get#property(#t176), n1) in let final void #t178 = self::ClassExtension|set#property(#t176, #t177) in #t177);
+  self::expect(n0, let final self::Class #t179 = v in let final self::Number #t180 = self::NumberExtension|-(self::ClassExtension|get#property(#t179), n2) in let final void #t181 = self::ClassExtension|set#property(#t179, #t180) in #t180);
+  self::expect(n1, let final self::Class #t182 = v in let final self::Number #t183 = self::NumberExtension|+(self::ClassExtension|get#property(#t182), n1) in let final void #t184 = self::ClassExtension|set#property(#t182, #t183) in #t183);
+  self::expect(n0, let final self::Class #t185 = v in let final self::Number #t186 = self::NumberExtension|-(self::ClassExtension|get#property(#t185), n1) in let final void #t187 = self::ClassExtension|set#property(#t185, #t186) in #t186);
+  self::expect(n1, let final self::Class #t188 = v in let final self::Number #t189 = self::NumberExtension|+(self::ClassExtension|get#property(#t188), 1) in let final void #t190 = self::ClassExtension|set#property(#t188, #t189) in #t189);
+  self::expect(n0, let final self::Class #t191 = v in let final self::Number #t192 = self::NumberExtension|-(self::ClassExtension|get#property(#t191), 1) in let final void #t193 = self::ClassExtension|set#property(#t191, #t192) in #t192);
+  self::expect(n0, let final self::Class #t194 = v in let final self::Number #t195 = self::ClassExtension|get#property(#t194) in let final self::Number #t196 = let final self::Number #t197 = self::NumberExtension|+(#t195, 1) in let final void #t198 = self::ClassExtension|set#property(#t194, #t197) in #t197 in #t195);
+  self::expect(n1, let final self::Class #t199 = v in let final self::Number #t200 = self::ClassExtension|get#property(#t199) in let final self::Number #t201 = let final self::Number #t202 = self::NumberExtension|-(#t200, 1) in let final void #t203 = self::ClassExtension|set#property(#t199, #t202) in #t202 in #t200);
   self::expect(n0, self::ClassExtension|get#property(v));
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t204 = v in self::ClassExtension|set#property(#t204, self::NumberExtension|+(self::ClassExtension|get#property(#t204), n1));
+  let final self::Class #t204 = v in self::ClassExtension|set#property(#t204, self::NumberExtension|+(self::ClassExtension|get#property(#t204), n1));
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t205 = v in self::ClassExtension|set#property(#t205, self::NumberExtension|+(self::ClassExtension|get#property(#t205), n1));
+  let final self::Class #t205 = v in self::ClassExtension|set#property(#t205, self::NumberExtension|+(self::ClassExtension|get#property(#t205), n1));
   self::expect(n2, self::ClassExtension|get#property(v));
-  let final self::Class* #t206 = v in self::ClassExtension|set#property(#t206, self::NumberExtension|-(self::ClassExtension|get#property(#t206), n2));
+  let final self::Class #t206 = v in self::ClassExtension|set#property(#t206, self::NumberExtension|-(self::ClassExtension|get#property(#t206), n2));
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t207 = v in self::ClassExtension|set#property(#t207, self::NumberExtension|+(self::ClassExtension|get#property(#t207), n1));
+  let final self::Class #t207 = v in self::ClassExtension|set#property(#t207, self::NumberExtension|+(self::ClassExtension|get#property(#t207), n1));
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t208 = v in self::ClassExtension|set#property(#t208, self::NumberExtension|-(self::ClassExtension|get#property(#t208), n1));
+  let final self::Class #t208 = v in self::ClassExtension|set#property(#t208, self::NumberExtension|-(self::ClassExtension|get#property(#t208), n1));
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t209 = v in let final self::Number* #t210 = self::NumberExtension|+(self::ClassExtension|get#property(#t209), 1) in let final void #t211 = self::ClassExtension|set#property(#t209, #t210) in #t210;
+  let final self::Class #t209 = v in let final self::Number #t210 = self::NumberExtension|+(self::ClassExtension|get#property(#t209), 1) in let final void #t211 = self::ClassExtension|set#property(#t209, #t210) in #t210;
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t212 = v in let final self::Number* #t213 = self::NumberExtension|-(self::ClassExtension|get#property(#t212), 1) in let final void #t214 = self::ClassExtension|set#property(#t212, #t213) in #t213;
+  let final self::Class #t212 = v in let final self::Number #t213 = self::NumberExtension|-(self::ClassExtension|get#property(#t212), 1) in let final void #t214 = self::ClassExtension|set#property(#t212, #t213) in #t213;
   self::expect(n0, self::ClassExtension|get#property(v));
-  let final self::Class* #t215 = v in self::ClassExtension|set#property(#t215, self::NumberExtension|+(self::ClassExtension|get#property(#t215), 1));
+  let final self::Class #t215 = v in self::ClassExtension|set#property(#t215, self::NumberExtension|+(self::ClassExtension|get#property(#t215), 1));
   self::expect(n1, self::ClassExtension|get#property(v));
-  let final self::Class* #t216 = v in self::ClassExtension|set#property(#t216, self::NumberExtension|-(self::ClassExtension|get#property(#t216), 1));
+  let final self::Class #t216 = v in self::ClassExtension|set#property(#t216, self::NumberExtension|-(self::ClassExtension|get#property(#t216), 1));
   self::expect(n0, self::ClassExtension|get#property(v));
 }
 static method testExplicitIntProperties() → dynamic {
-  core::int* n0 = 0;
-  core::int* n1 = 1;
-  core::int* n2 = 2;
-  self::IntClass* v = new self::IntClass::•(n0);
+  core::int n0 = 0;
+  core::int n1 = 1;
+  core::int n2 = 2;
+  self::IntClass v = new self::IntClass::•(n0);
   self::expect(n0, self::IntClassExtension|get#property(v));
-  self::expect(n1, let final self::IntClass* #t217 = v in let final core::int* #t218 = self::IntClassExtension|get#property(#t217).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t219 = self::IntClassExtension|set#property(#t217, #t218) in #t218);
-  self::expect(n2, let final self::IntClass* #t220 = v in let final core::int* #t221 = self::IntClassExtension|get#property(#t220).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t222 = self::IntClassExtension|set#property(#t220, #t221) in #t221);
-  self::expect(n0, let final self::IntClass* #t223 = v in let final core::int* #t224 = self::IntClassExtension|get#property(#t223).{core::num::-}(n2){(core::num*) →* core::int*} in let final void #t225 = self::IntClassExtension|set#property(#t223, #t224) in #t224);
-  self::expect(n1, let final self::IntClass* #t226 = v in let final core::int* #t227 = self::IntClassExtension|get#property(#t226).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t228 = self::IntClassExtension|set#property(#t226, #t227) in #t227);
-  self::expect(n0, let final self::IntClass* #t229 = v in let final core::int* #t230 = self::IntClassExtension|get#property(#t229).{core::num::-}(n1){(core::num*) →* core::int*} in let final void #t231 = self::IntClassExtension|set#property(#t229, #t230) in #t230);
-  self::expect(n1, let final self::IntClass* #t232 = v in let final core::int* #t233 = self::IntClassExtension|get#property(#t232).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t234 = self::IntClassExtension|set#property(#t232, #t233) in #t233);
-  self::expect(n0, let final self::IntClass* #t235 = v in let final core::int* #t236 = self::IntClassExtension|get#property(#t235).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t237 = self::IntClassExtension|set#property(#t235, #t236) in #t236);
-  self::expect(n0, let final self::IntClass* #t238 = v in let final core::int* #t239 = self::IntClassExtension|get#property(#t238) in let final core::int* #t240 = let final core::int* #t241 = #t239.{core::num::+}(1){(core::num*) →* core::int*} in let final void #t242 = self::IntClassExtension|set#property(#t238, #t241) in #t241 in #t239);
-  self::expect(n1, let final self::IntClass* #t243 = v in let final core::int* #t244 = self::IntClassExtension|get#property(#t243) in let final core::int* #t245 = let final core::int* #t246 = #t244.{core::num::-}(1){(core::num*) →* core::int*} in let final void #t247 = self::IntClassExtension|set#property(#t243, #t246) in #t246 in #t244);
+  self::expect(n1, let final self::IntClass #t217 = v in let final core::int #t218 = self::IntClassExtension|get#property(#t217).{core::num::+}(n1){(core::num) → core::int} in let final void #t219 = self::IntClassExtension|set#property(#t217, #t218) in #t218);
+  self::expect(n2, let final self::IntClass #t220 = v in let final core::int #t221 = self::IntClassExtension|get#property(#t220).{core::num::+}(n1){(core::num) → core::int} in let final void #t222 = self::IntClassExtension|set#property(#t220, #t221) in #t221);
+  self::expect(n0, let final self::IntClass #t223 = v in let final core::int #t224 = self::IntClassExtension|get#property(#t223).{core::num::-}(n2){(core::num) → core::int} in let final void #t225 = self::IntClassExtension|set#property(#t223, #t224) in #t224);
+  self::expect(n1, let final self::IntClass #t226 = v in let final core::int #t227 = self::IntClassExtension|get#property(#t226).{core::num::+}(n1){(core::num) → core::int} in let final void #t228 = self::IntClassExtension|set#property(#t226, #t227) in #t227);
+  self::expect(n0, let final self::IntClass #t229 = v in let final core::int #t230 = self::IntClassExtension|get#property(#t229).{core::num::-}(n1){(core::num) → core::int} in let final void #t231 = self::IntClassExtension|set#property(#t229, #t230) in #t230);
+  self::expect(n1, let final self::IntClass #t232 = v in let final core::int #t233 = self::IntClassExtension|get#property(#t232).{core::num::+}(1){(core::num) → core::int} in let final void #t234 = self::IntClassExtension|set#property(#t232, #t233) in #t233);
+  self::expect(n0, let final self::IntClass #t235 = v in let final core::int #t236 = self::IntClassExtension|get#property(#t235).{core::num::-}(1){(core::num) → core::int} in let final void #t237 = self::IntClassExtension|set#property(#t235, #t236) in #t236);
+  self::expect(n0, let final self::IntClass #t238 = v in let final core::int #t239 = self::IntClassExtension|get#property(#t238) in let final core::int #t240 = let final core::int #t241 = #t239.{core::num::+}(1){(core::num) → core::int} in let final void #t242 = self::IntClassExtension|set#property(#t238, #t241) in #t241 in #t239);
+  self::expect(n1, let final self::IntClass #t243 = v in let final core::int #t244 = self::IntClassExtension|get#property(#t243) in let final core::int #t245 = let final core::int #t246 = #t244.{core::num::-}(1){(core::num) → core::int} in let final void #t247 = self::IntClassExtension|set#property(#t243, #t246) in #t246 in #t244);
   self::expect(n0, self::IntClassExtension|get#property(v));
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t248 = v in self::IntClassExtension|set#property(#t248, self::IntClassExtension|get#property(#t248).{core::num::+}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t248 = v in self::IntClassExtension|set#property(#t248, self::IntClassExtension|get#property(#t248).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t249 = v in self::IntClassExtension|set#property(#t249, self::IntClassExtension|get#property(#t249).{core::num::+}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t249 = v in self::IntClassExtension|set#property(#t249, self::IntClassExtension|get#property(#t249).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n2, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t250 = v in self::IntClassExtension|set#property(#t250, self::IntClassExtension|get#property(#t250).{core::num::-}(n2){(core::num*) →* core::int*});
+  let final self::IntClass #t250 = v in self::IntClassExtension|set#property(#t250, self::IntClassExtension|get#property(#t250).{core::num::-}(n2){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t251 = v in self::IntClassExtension|set#property(#t251, self::IntClassExtension|get#property(#t251).{core::num::+}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t251 = v in self::IntClassExtension|set#property(#t251, self::IntClassExtension|get#property(#t251).{core::num::+}(n1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t252 = v in self::IntClassExtension|set#property(#t252, self::IntClassExtension|get#property(#t252).{core::num::-}(n1){(core::num*) →* core::int*});
+  let final self::IntClass #t252 = v in self::IntClassExtension|set#property(#t252, self::IntClassExtension|get#property(#t252).{core::num::-}(n1){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t253 = v in let final core::int* #t254 = self::IntClassExtension|get#property(#t253).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t255 = self::IntClassExtension|set#property(#t253, #t254) in #t254;
+  let final self::IntClass #t253 = v in let final core::int #t254 = self::IntClassExtension|get#property(#t253).{core::num::+}(1){(core::num) → core::int} in let final void #t255 = self::IntClassExtension|set#property(#t253, #t254) in #t254;
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t256 = v in let final core::int* #t257 = self::IntClassExtension|get#property(#t256).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t258 = self::IntClassExtension|set#property(#t256, #t257) in #t257;
+  let final self::IntClass #t256 = v in let final core::int #t257 = self::IntClassExtension|get#property(#t256).{core::num::-}(1){(core::num) → core::int} in let final void #t258 = self::IntClassExtension|set#property(#t256, #t257) in #t257;
   self::expect(n0, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t259 = v in self::IntClassExtension|set#property(#t259, self::IntClassExtension|get#property(#t259).{core::num::+}(1){(core::num*) →* core::int*});
+  let final self::IntClass #t259 = v in self::IntClassExtension|set#property(#t259, self::IntClassExtension|get#property(#t259).{core::num::+}(1){(core::num) → core::int});
   self::expect(n1, self::IntClassExtension|get#property(v));
-  let final self::IntClass* #t260 = v in self::IntClassExtension|set#property(#t260, self::IntClassExtension|get#property(#t260).{core::num::-}(1){(core::num*) →* core::int*});
+  let final self::IntClass #t260 = v in self::IntClassExtension|set#property(#t260, self::IntClassExtension|get#property(#t260).{core::num::-}(1){(core::num) → core::int});
   self::expect(n0, self::IntClassExtension|get#property(v));
 }
-static method testExplicitNullAwareProperties(self::Class* v) → dynamic {
-  self::Number* n0 = new self::Number::•(0);
-  self::Number* n1 = new self::Number::•(1);
-  self::Number* n2 = new self::Number::•(2);
-  self::expect(n0, let final self::Class* #t261 = v in #t261 == null ?{self::Number*} null : self::ClassExtension|get#property(#t261), v == null);
-  self::expect(n1, let final self::Class* #t262 = v in #t262 == null ?{self::Number*} null : let final self::Number* #t263 = self::NumberExtension|+(self::ClassExtension|get#property(#t262), n1) in let final void #t264 = self::ClassExtension|set#property(#t262, #t263) in #t263, v == null);
-  self::expect(n2, let final self::Class* #t265 = v in #t265 == null ?{self::Number*} null : let final self::Number* #t266 = self::NumberExtension|+(self::ClassExtension|get#property(#t265), n1) in let final void #t267 = self::ClassExtension|set#property(#t265, #t266) in #t266, v == null);
-  self::expect(n0, let final self::Class* #t268 = v in #t268 == null ?{self::Number*} null : let final self::Number* #t269 = self::NumberExtension|-(self::ClassExtension|get#property(#t268), n2) in let final void #t270 = self::ClassExtension|set#property(#t268, #t269) in #t269, v == null);
-  self::expect(n1, let final self::Class* #t271 = v in #t271 == null ?{self::Number*} null : let final self::Number* #t272 = self::NumberExtension|+(self::ClassExtension|get#property(#t271), n1) in let final void #t273 = self::ClassExtension|set#property(#t271, #t272) in #t272, v == null);
-  self::expect(n0, let final self::Class* #t274 = v in #t274 == null ?{self::Number*} null : let final self::Number* #t275 = self::NumberExtension|-(self::ClassExtension|get#property(#t274), n1) in let final void #t276 = self::ClassExtension|set#property(#t274, #t275) in #t275, v == null);
-  self::expect(n1, let final self::Class* #t277 = v in #t277 == null ?{self::Number*} null : let final self::Number* #t278 = self::NumberExtension|+(self::ClassExtension|get#property(#t277), 1) in let final void #t279 = self::ClassExtension|set#property(#t277, #t278) in #t278, v == null);
-  self::expect(n0, let final self::Class* #t280 = v in #t280 == null ?{self::Number*} null : let final self::Number* #t281 = self::NumberExtension|-(self::ClassExtension|get#property(#t280), 1) in let final void #t282 = self::ClassExtension|set#property(#t280, #t281) in #t281, v == null);
-  self::expect(n0, let final self::Class* #t283 = v in #t283 == null ?{self::Number*} null : let final self::Number* #t284 = self::ClassExtension|get#property(#t283) in let final self::Number* #t285 = let final self::Number* #t286 = self::NumberExtension|+(#t284, 1) in let final void #t287 = self::ClassExtension|set#property(#t283, #t286) in #t286 in #t284, v == null);
-  self::expect(n1, let final self::Class* #t288 = v in #t288 == null ?{self::Number*} null : let final self::Number* #t289 = self::ClassExtension|get#property(#t288) in let final self::Number* #t290 = let final self::Number* #t291 = self::NumberExtension|-(#t289, 1) in let final void #t292 = self::ClassExtension|set#property(#t288, #t291) in #t291 in #t289, v == null);
-  self::expect(n0, let final self::Class* #t293 = v in #t293 == null ?{self::Number*} null : self::ClassExtension|get#property(#t293), v == null);
-  self::expect(n0, let final self::Class* #t294 = v in #t294 == null ?{self::Number*} null : self::ClassExtension|get#property(#t294), v == null);
-  let final self::Class* #t295 = v in #t295 == null ?{self::Number*} null : self::ClassExtension|set#property(#t295, self::NumberExtension|+(self::ClassExtension|get#property(#t295), n1));
-  self::expect(n1, let final self::Class* #t296 = v in #t296 == null ?{self::Number*} null : self::ClassExtension|get#property(#t296), v == null);
-  let final self::Class* #t297 = v in #t297 == null ?{self::Number*} null : self::ClassExtension|set#property(#t297, self::NumberExtension|+(self::ClassExtension|get#property(#t297), n1));
-  self::expect(n2, let final self::Class* #t298 = v in #t298 == null ?{self::Number*} null : self::ClassExtension|get#property(#t298), v == null);
-  let final self::Class* #t299 = v in #t299 == null ?{self::Number*} null : self::ClassExtension|set#property(#t299, self::NumberExtension|-(self::ClassExtension|get#property(#t299), n2));
-  self::expect(n0, let final self::Class* #t300 = v in #t300 == null ?{self::Number*} null : self::ClassExtension|get#property(#t300), v == null);
-  let final self::Class* #t301 = v in #t301 == null ?{self::Number*} null : self::ClassExtension|set#property(#t301, self::NumberExtension|+(self::ClassExtension|get#property(#t301), n1));
-  self::expect(n1, let final self::Class* #t302 = v in #t302 == null ?{self::Number*} null : self::ClassExtension|get#property(#t302), v == null);
-  let final self::Class* #t303 = v in #t303 == null ?{self::Number*} null : self::ClassExtension|set#property(#t303, self::NumberExtension|-(self::ClassExtension|get#property(#t303), n1));
-  self::expect(n0, let final self::Class* #t304 = v in #t304 == null ?{self::Number*} null : self::ClassExtension|get#property(#t304), v == null);
-  let final self::Class* #t305 = v in #t305 == null ?{self::Number*} null : let final self::Number* #t306 = self::NumberExtension|+(self::ClassExtension|get#property(#t305), 1) in let final void #t307 = self::ClassExtension|set#property(#t305, #t306) in #t306;
-  self::expect(n1, let final self::Class* #t308 = v in #t308 == null ?{self::Number*} null : self::ClassExtension|get#property(#t308), v == null);
-  let final self::Class* #t309 = v in #t309 == null ?{self::Number*} null : let final self::Number* #t310 = self::NumberExtension|-(self::ClassExtension|get#property(#t309), 1) in let final void #t311 = self::ClassExtension|set#property(#t309, #t310) in #t310;
-  self::expect(n0, let final self::Class* #t312 = v in #t312 == null ?{self::Number*} null : self::ClassExtension|get#property(#t312), v == null);
-  let final self::Class* #t313 = v in #t313 == null ?{self::Number*} null : self::ClassExtension|set#property(#t313, self::NumberExtension|+(self::ClassExtension|get#property(#t313), 1));
-  self::expect(n1, let final self::Class* #t314 = v in #t314 == null ?{self::Number*} null : self::ClassExtension|get#property(#t314), v == null);
-  let final self::Class* #t315 = v in #t315 == null ?{self::Number*} null : self::ClassExtension|set#property(#t315, self::NumberExtension|-(self::ClassExtension|get#property(#t315), 1));
-  self::expect(n0, let final self::Class* #t316 = v in #t316 == null ?{self::Number*} null : self::ClassExtension|get#property(#t316), v == null);
+static method testExplicitNullAwareProperties(self::Class? v) → dynamic {
+  self::Number n0 = new self::Number::•(0);
+  self::Number n1 = new self::Number::•(1);
+  self::Number n2 = new self::Number::•(2);
+  self::expect(n0, let final self::Class? #t261 = v in #t261 == null ?{self::Number?} null : self::ClassExtension|get#property(#t261{self::Class}), v == null);
+  self::expect(n1, let final self::Class? #t262 = v in #t262 == null ?{self::Number?} null : let final self::Number #t263 = self::NumberExtension|+(self::ClassExtension|get#property(#t262{self::Class}), n1) in let final void #t264 = self::ClassExtension|set#property(#t262{self::Class}, #t263) in #t263, v == null);
+  self::expect(n2, let final self::Class? #t265 = v in #t265 == null ?{self::Number?} null : let final self::Number #t266 = self::NumberExtension|+(self::ClassExtension|get#property(#t265{self::Class}), n1) in let final void #t267 = self::ClassExtension|set#property(#t265{self::Class}, #t266) in #t266, v == null);
+  self::expect(n0, let final self::Class? #t268 = v in #t268 == null ?{self::Number?} null : let final self::Number #t269 = self::NumberExtension|-(self::ClassExtension|get#property(#t268{self::Class}), n2) in let final void #t270 = self::ClassExtension|set#property(#t268{self::Class}, #t269) in #t269, v == null);
+  self::expect(n1, let final self::Class? #t271 = v in #t271 == null ?{self::Number?} null : let final self::Number #t272 = self::NumberExtension|+(self::ClassExtension|get#property(#t271{self::Class}), n1) in let final void #t273 = self::ClassExtension|set#property(#t271{self::Class}, #t272) in #t272, v == null);
+  self::expect(n0, let final self::Class? #t274 = v in #t274 == null ?{self::Number?} null : let final self::Number #t275 = self::NumberExtension|-(self::ClassExtension|get#property(#t274{self::Class}), n1) in let final void #t276 = self::ClassExtension|set#property(#t274{self::Class}, #t275) in #t275, v == null);
+  self::expect(n1, let final self::Class? #t277 = v in #t277 == null ?{self::Number?} null : let final self::Number #t278 = self::NumberExtension|+(self::ClassExtension|get#property(#t277{self::Class}), 1) in let final void #t279 = self::ClassExtension|set#property(#t277{self::Class}, #t278) in #t278, v == null);
+  self::expect(n0, let final self::Class? #t280 = v in #t280 == null ?{self::Number?} null : let final self::Number #t281 = self::NumberExtension|-(self::ClassExtension|get#property(#t280{self::Class}), 1) in let final void #t282 = self::ClassExtension|set#property(#t280{self::Class}, #t281) in #t281, v == null);
+  self::expect(n0, let final self::Class? #t283 = v in #t283 == null ?{self::Number?} null : let final self::Number #t284 = self::ClassExtension|get#property(#t283{self::Class}) in let final self::Number #t285 = let final self::Number #t286 = self::NumberExtension|+(#t284, 1) in let final void #t287 = self::ClassExtension|set#property(#t283{self::Class}, #t286) in #t286 in #t284, v == null);
+  self::expect(n1, let final self::Class? #t288 = v in #t288 == null ?{self::Number?} null : let final self::Number #t289 = self::ClassExtension|get#property(#t288{self::Class}) in let final self::Number #t290 = let final self::Number #t291 = self::NumberExtension|-(#t289, 1) in let final void #t292 = self::ClassExtension|set#property(#t288{self::Class}, #t291) in #t291 in #t289, v == null);
+  self::expect(n0, let final self::Class? #t293 = v in #t293 == null ?{self::Number?} null : self::ClassExtension|get#property(#t293{self::Class}), v == null);
+  self::expect(n0, let final self::Class? #t294 = v in #t294 == null ?{self::Number?} null : self::ClassExtension|get#property(#t294{self::Class}), v == null);
+  let final self::Class? #t295 = v in #t295 == null ?{self::Number?} null : self::ClassExtension|set#property(#t295{self::Class}, self::NumberExtension|+(self::ClassExtension|get#property(#t295{self::Class}), n1));
+  self::expect(n1, let final self::Class? #t296 = v in #t296 == null ?{self::Number?} null : self::ClassExtension|get#property(#t296{self::Class}), v == null);
+  let final self::Class? #t297 = v in #t297 == null ?{self::Number?} null : self::ClassExtension|set#property(#t297{self::Class}, self::NumberExtension|+(self::ClassExtension|get#property(#t297{self::Class}), n1));
+  self::expect(n2, let final self::Class? #t298 = v in #t298 == null ?{self::Number?} null : self::ClassExtension|get#property(#t298{self::Class}), v == null);
+  let final self::Class? #t299 = v in #t299 == null ?{self::Number?} null : self::ClassExtension|set#property(#t299{self::Class}, self::NumberExtension|-(self::ClassExtension|get#property(#t299{self::Class}), n2));
+  self::expect(n0, let final self::Class? #t300 = v in #t300 == null ?{self::Number?} null : self::ClassExtension|get#property(#t300{self::Class}), v == null);
+  let final self::Class? #t301 = v in #t301 == null ?{self::Number?} null : self::ClassExtension|set#property(#t301{self::Class}, self::NumberExtension|+(self::ClassExtension|get#property(#t301{self::Class}), n1));
+  self::expect(n1, let final self::Class? #t302 = v in #t302 == null ?{self::Number?} null : self::ClassExtension|get#property(#t302{self::Class}), v == null);
+  let final self::Class? #t303 = v in #t303 == null ?{self::Number?} null : self::ClassExtension|set#property(#t303{self::Class}, self::NumberExtension|-(self::ClassExtension|get#property(#t303{self::Class}), n1));
+  self::expect(n0, let final self::Class? #t304 = v in #t304 == null ?{self::Number?} null : self::ClassExtension|get#property(#t304{self::Class}), v == null);
+  let final self::Class? #t305 = v in #t305 == null ?{self::Number?} null : let final self::Number #t306 = self::NumberExtension|+(self::ClassExtension|get#property(#t305{self::Class}), 1) in let final void #t307 = self::ClassExtension|set#property(#t305{self::Class}, #t306) in #t306;
+  self::expect(n1, let final self::Class? #t308 = v in #t308 == null ?{self::Number?} null : self::ClassExtension|get#property(#t308{self::Class}), v == null);
+  let final self::Class? #t309 = v in #t309 == null ?{self::Number?} null : let final self::Number #t310 = self::NumberExtension|-(self::ClassExtension|get#property(#t309{self::Class}), 1) in let final void #t311 = self::ClassExtension|set#property(#t309{self::Class}, #t310) in #t310;
+  self::expect(n0, let final self::Class? #t312 = v in #t312 == null ?{self::Number?} null : self::ClassExtension|get#property(#t312{self::Class}), v == null);
+  let final self::Class? #t313 = v in #t313 == null ?{self::Number?} null : self::ClassExtension|set#property(#t313{self::Class}, self::NumberExtension|+(self::ClassExtension|get#property(#t313{self::Class}), 1));
+  self::expect(n1, let final self::Class? #t314 = v in #t314 == null ?{self::Number?} null : self::ClassExtension|get#property(#t314{self::Class}), v == null);
+  let final self::Class? #t315 = v in #t315 == null ?{self::Number?} null : self::ClassExtension|set#property(#t315{self::Class}, self::NumberExtension|-(self::ClassExtension|get#property(#t315{self::Class}), 1));
+  self::expect(n0, let final self::Class? #t316 = v in #t316 == null ?{self::Number?} null : self::ClassExtension|get#property(#t316{self::Class}), v == null);
 }
-static method testExplicitNullAwareIntProperties(self::IntClass* v) → dynamic {
-  core::int* n0 = 0;
-  core::int* n1 = 1;
-  core::int* n2 = 2;
-  self::expect(n0, let final self::IntClass* #t317 = v in #t317 == null ?{core::int*} null : self::IntClassExtension|get#property(#t317), v == null);
-  self::expect(n1, let final self::IntClass* #t318 = v in #t318 == null ?{core::int*} null : let final core::int* #t319 = self::IntClassExtension|get#property(#t318).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t320 = self::IntClassExtension|set#property(#t318, #t319) in #t319, v == null);
-  self::expect(n2, let final self::IntClass* #t321 = v in #t321 == null ?{core::int*} null : let final core::int* #t322 = self::IntClassExtension|get#property(#t321).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t323 = self::IntClassExtension|set#property(#t321, #t322) in #t322, v == null);
-  self::expect(n0, let final self::IntClass* #t324 = v in #t324 == null ?{core::int*} null : let final core::int* #t325 = self::IntClassExtension|get#property(#t324).{core::num::-}(n2){(core::num*) →* core::int*} in let final void #t326 = self::IntClassExtension|set#property(#t324, #t325) in #t325, v == null);
-  self::expect(n1, let final self::IntClass* #t327 = v in #t327 == null ?{core::int*} null : let final core::int* #t328 = self::IntClassExtension|get#property(#t327).{core::num::+}(n1){(core::num*) →* core::int*} in let final void #t329 = self::IntClassExtension|set#property(#t327, #t328) in #t328, v == null);
-  self::expect(n0, let final self::IntClass* #t330 = v in #t330 == null ?{core::int*} null : let final core::int* #t331 = self::IntClassExtension|get#property(#t330).{core::num::-}(n1){(core::num*) →* core::int*} in let final void #t332 = self::IntClassExtension|set#property(#t330, #t331) in #t331, v == null);
-  self::expect(n1, let final self::IntClass* #t333 = v in #t333 == null ?{core::int*} null : let final core::int* #t334 = self::IntClassExtension|get#property(#t333).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t335 = self::IntClassExtension|set#property(#t333, #t334) in #t334, v == null);
-  self::expect(n0, let final self::IntClass* #t336 = v in #t336 == null ?{core::int*} null : let final core::int* #t337 = self::IntClassExtension|get#property(#t336).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t338 = self::IntClassExtension|set#property(#t336, #t337) in #t337, v == null);
-  self::expect(n0, let final self::IntClass* #t339 = v in #t339 == null ?{core::int*} null : let final core::int* #t340 = self::IntClassExtension|get#property(#t339) in let final core::int* #t341 = let final core::int* #t342 = #t340.{core::num::+}(1){(core::num*) →* core::int*} in let final void #t343 = self::IntClassExtension|set#property(#t339, #t342) in #t342 in #t340, v == null);
-  self::expect(n1, let final self::IntClass* #t344 = v in #t344 == null ?{core::int*} null : let final core::int* #t345 = self::IntClassExtension|get#property(#t344) in let final core::int* #t346 = let final core::int* #t347 = #t345.{core::num::-}(1){(core::num*) →* core::int*} in let final void #t348 = self::IntClassExtension|set#property(#t344, #t347) in #t347 in #t345, v == null);
-  self::expect(n0, let final self::IntClass* #t349 = v in #t349 == null ?{core::int*} null : self::IntClassExtension|get#property(#t349), v == null);
-  self::expect(n0, let final self::IntClass* #t350 = v in #t350 == null ?{core::int*} null : self::IntClassExtension|get#property(#t350), v == null);
-  let final self::IntClass* #t351 = v in #t351 == null ?{core::int*} null : self::IntClassExtension|set#property(#t351, self::IntClassExtension|get#property(#t351).{core::num::+}(n1){(core::num*) →* core::int*});
-  self::expect(n1, let final self::IntClass* #t352 = v in #t352 == null ?{core::int*} null : self::IntClassExtension|get#property(#t352), v == null);
-  let final self::IntClass* #t353 = v in #t353 == null ?{core::int*} null : self::IntClassExtension|set#property(#t353, self::IntClassExtension|get#property(#t353).{core::num::+}(n1){(core::num*) →* core::int*});
-  self::expect(n2, let final self::IntClass* #t354 = v in #t354 == null ?{core::int*} null : self::IntClassExtension|get#property(#t354), v == null);
-  let final self::IntClass* #t355 = v in #t355 == null ?{core::int*} null : self::IntClassExtension|set#property(#t355, self::IntClassExtension|get#property(#t355).{core::num::-}(n2){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t356 = v in #t356 == null ?{core::int*} null : self::IntClassExtension|get#property(#t356), v == null);
-  let final self::IntClass* #t357 = v in #t357 == null ?{core::int*} null : self::IntClassExtension|set#property(#t357, self::IntClassExtension|get#property(#t357).{core::num::+}(n1){(core::num*) →* core::int*});
-  self::expect(n1, let final self::IntClass* #t358 = v in #t358 == null ?{core::int*} null : self::IntClassExtension|get#property(#t358), v == null);
-  let final self::IntClass* #t359 = v in #t359 == null ?{core::int*} null : self::IntClassExtension|set#property(#t359, self::IntClassExtension|get#property(#t359).{core::num::-}(n1){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t360 = v in #t360 == null ?{core::int*} null : self::IntClassExtension|get#property(#t360), v == null);
-  let final self::IntClass* #t361 = v in #t361 == null ?{core::int*} null : let final core::int* #t362 = self::IntClassExtension|get#property(#t361).{core::num::+}(1){(core::num*) →* core::int*} in let final void #t363 = self::IntClassExtension|set#property(#t361, #t362) in #t362;
-  self::expect(n1, let final self::IntClass* #t364 = v in #t364 == null ?{core::int*} null : self::IntClassExtension|get#property(#t364), v == null);
-  let final self::IntClass* #t365 = v in #t365 == null ?{core::int*} null : let final core::int* #t366 = self::IntClassExtension|get#property(#t365).{core::num::-}(1){(core::num*) →* core::int*} in let final void #t367 = self::IntClassExtension|set#property(#t365, #t366) in #t366;
-  self::expect(n0, let final self::IntClass* #t368 = v in #t368 == null ?{core::int*} null : self::IntClassExtension|get#property(#t368), v == null);
-  let final self::IntClass* #t369 = v in #t369 == null ?{core::int*} null : self::IntClassExtension|set#property(#t369, self::IntClassExtension|get#property(#t369).{core::num::+}(1){(core::num*) →* core::int*});
-  self::expect(n1, let final self::IntClass* #t370 = v in #t370 == null ?{core::int*} null : self::IntClassExtension|get#property(#t370), v == null);
-  let final self::IntClass* #t371 = v in #t371 == null ?{core::int*} null : self::IntClassExtension|set#property(#t371, self::IntClassExtension|get#property(#t371).{core::num::-}(1){(core::num*) →* core::int*});
-  self::expect(n0, let final self::IntClass* #t372 = v in #t372 == null ?{core::int*} null : self::IntClassExtension|get#property(#t372), v == null);
+static method testExplicitNullAwareIntProperties(self::IntClass? v) → dynamic {
+  core::int n0 = 0;
+  core::int n1 = 1;
+  core::int n2 = 2;
+  self::expect(n0, let final self::IntClass? #t317 = v in #t317 == null ?{core::int?} null : self::IntClassExtension|get#property(#t317{self::IntClass}), v == null);
+  self::expect(n1, let final self::IntClass? #t318 = v in #t318 == null ?{core::int?} null : let final core::int #t319 = self::IntClassExtension|get#property(#t318{self::IntClass}).{core::num::+}(n1){(core::num) → core::int} in let final void #t320 = self::IntClassExtension|set#property(#t318{self::IntClass}, #t319) in #t319, v == null);
+  self::expect(n2, let final self::IntClass? #t321 = v in #t321 == null ?{core::int?} null : let final core::int #t322 = self::IntClassExtension|get#property(#t321{self::IntClass}).{core::num::+}(n1){(core::num) → core::int} in let final void #t323 = self::IntClassExtension|set#property(#t321{self::IntClass}, #t322) in #t322, v == null);
+  self::expect(n0, let final self::IntClass? #t324 = v in #t324 == null ?{core::int?} null : let final core::int #t325 = self::IntClassExtension|get#property(#t324{self::IntClass}).{core::num::-}(n2){(core::num) → core::int} in let final void #t326 = self::IntClassExtension|set#property(#t324{self::IntClass}, #t325) in #t325, v == null);
+  self::expect(n1, let final self::IntClass? #t327 = v in #t327 == null ?{core::int?} null : let final core::int #t328 = self::IntClassExtension|get#property(#t327{self::IntClass}).{core::num::+}(n1){(core::num) → core::int} in let final void #t329 = self::IntClassExtension|set#property(#t327{self::IntClass}, #t328) in #t328, v == null);
+  self::expect(n0, let final self::IntClass? #t330 = v in #t330 == null ?{core::int?} null : let final core::int #t331 = self::IntClassExtension|get#property(#t330{self::IntClass}).{core::num::-}(n1){(core::num) → core::int} in let final void #t332 = self::IntClassExtension|set#property(#t330{self::IntClass}, #t331) in #t331, v == null);
+  self::expect(n1, let final self::IntClass? #t333 = v in #t333 == null ?{core::int?} null : let final core::int #t334 = self::IntClassExtension|get#property(#t333{self::IntClass}).{core::num::+}(1){(core::num) → core::int} in let final void #t335 = self::IntClassExtension|set#property(#t333{self::IntClass}, #t334) in #t334, v == null);
+  self::expect(n0, let final self::IntClass? #t336 = v in #t336 == null ?{core::int?} null : let final core::int #t337 = self::IntClassExtension|get#property(#t336{self::IntClass}).{core::num::-}(1){(core::num) → core::int} in let final void #t338 = self::IntClassExtension|set#property(#t336{self::IntClass}, #t337) in #t337, v == null);
+  self::expect(n0, let final self::IntClass? #t339 = v in #t339 == null ?{core::int?} null : let final core::int #t340 = self::IntClassExtension|get#property(#t339{self::IntClass}) in let final core::int #t341 = let final core::int #t342 = #t340.{core::num::+}(1){(core::num) → core::int} in let final void #t343 = self::IntClassExtension|set#property(#t339{self::IntClass}, #t342) in #t342 in #t340, v == null);
+  self::expect(n1, let final self::IntClass? #t344 = v in #t344 == null ?{core::int?} null : let final core::int #t345 = self::IntClassExtension|get#property(#t344{self::IntClass}) in let final core::int #t346 = let final core::int #t347 = #t345.{core::num::-}(1){(core::num) → core::int} in let final void #t348 = self::IntClassExtension|set#property(#t344{self::IntClass}, #t347) in #t347 in #t345, v == null);
+  self::expect(n0, let final self::IntClass? #t349 = v in #t349 == null ?{core::int?} null : self::IntClassExtension|get#property(#t349{self::IntClass}), v == null);
+  self::expect(n0, let final self::IntClass? #t350 = v in #t350 == null ?{core::int?} null : self::IntClassExtension|get#property(#t350{self::IntClass}), v == null);
+  let final self::IntClass? #t351 = v in #t351 == null ?{core::int?} null : self::IntClassExtension|set#property(#t351{self::IntClass}, self::IntClassExtension|get#property(#t351{self::IntClass}).{core::num::+}(n1){(core::num) → core::int});
+  self::expect(n1, let final self::IntClass? #t352 = v in #t352 == null ?{core::int?} null : self::IntClassExtension|get#property(#t352{self::IntClass}), v == null);
+  let final self::IntClass? #t353 = v in #t353 == null ?{core::int?} null : self::IntClassExtension|set#property(#t353{self::IntClass}, self::IntClassExtension|get#property(#t353{self::IntClass}).{core::num::+}(n1){(core::num) → core::int});
+  self::expect(n2, let final self::IntClass? #t354 = v in #t354 == null ?{core::int?} null : self::IntClassExtension|get#property(#t354{self::IntClass}), v == null);
+  let final self::IntClass? #t355 = v in #t355 == null ?{core::int?} null : self::IntClassExtension|set#property(#t355{self::IntClass}, self::IntClassExtension|get#property(#t355{self::IntClass}).{core::num::-}(n2){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass? #t356 = v in #t356 == null ?{core::int?} null : self::IntClassExtension|get#property(#t356{self::IntClass}), v == null);
+  let final self::IntClass? #t357 = v in #t357 == null ?{core::int?} null : self::IntClassExtension|set#property(#t357{self::IntClass}, self::IntClassExtension|get#property(#t357{self::IntClass}).{core::num::+}(n1){(core::num) → core::int});
+  self::expect(n1, let final self::IntClass? #t358 = v in #t358 == null ?{core::int?} null : self::IntClassExtension|get#property(#t358{self::IntClass}), v == null);
+  let final self::IntClass? #t359 = v in #t359 == null ?{core::int?} null : self::IntClassExtension|set#property(#t359{self::IntClass}, self::IntClassExtension|get#property(#t359{self::IntClass}).{core::num::-}(n1){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass? #t360 = v in #t360 == null ?{core::int?} null : self::IntClassExtension|get#property(#t360{self::IntClass}), v == null);
+  let final self::IntClass? #t361 = v in #t361 == null ?{core::int?} null : let final core::int #t362 = self::IntClassExtension|get#property(#t361{self::IntClass}).{core::num::+}(1){(core::num) → core::int} in let final void #t363 = self::IntClassExtension|set#property(#t361{self::IntClass}, #t362) in #t362;
+  self::expect(n1, let final self::IntClass? #t364 = v in #t364 == null ?{core::int?} null : self::IntClassExtension|get#property(#t364{self::IntClass}), v == null);
+  let final self::IntClass? #t365 = v in #t365 == null ?{core::int?} null : let final core::int #t366 = self::IntClassExtension|get#property(#t365{self::IntClass}).{core::num::-}(1){(core::num) → core::int} in let final void #t367 = self::IntClassExtension|set#property(#t365{self::IntClass}, #t366) in #t366;
+  self::expect(n0, let final self::IntClass? #t368 = v in #t368 == null ?{core::int?} null : self::IntClassExtension|get#property(#t368{self::IntClass}), v == null);
+  let final self::IntClass? #t369 = v in #t369 == null ?{core::int?} null : self::IntClassExtension|set#property(#t369{self::IntClass}, self::IntClassExtension|get#property(#t369{self::IntClass}).{core::num::+}(1){(core::num) → core::int});
+  self::expect(n1, let final self::IntClass? #t370 = v in #t370 == null ?{core::int?} null : self::IntClassExtension|get#property(#t370{self::IntClass}), v == null);
+  let final self::IntClass? #t371 = v in #t371 == null ?{core::int?} null : self::IntClassExtension|set#property(#t371{self::IntClass}, self::IntClassExtension|get#property(#t371{self::IntClass}).{core::num::-}(1){(core::num) → core::int});
+  self::expect(n0, let final self::IntClass? #t372 = v in #t372 == null ?{core::int?} null : self::IntClassExtension|get#property(#t372{self::IntClass}), v == null);
 }
 static method expect(dynamic expected, dynamic actual, [dynamic expectNull = #C1]) → dynamic {
-  if(expectNull as{TypeError,ForDynamic} core::bool*) {
+  if(expectNull as{TypeError,ForDynamic,ForNonNullableByDefault} core::bool) {
     expected = null;
   }
-  if(!(expected =={core::Object::==}{(core::Object*) →* core::bool*} actual)) {
+  if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual)) {
     throw "Mismatch: expected=${expected}, actual=${actual}";
   }
 }

pkg/front_end/testcases/extensions/conflict_with_object.dart

@@ -1,11 +1,11 @@
 // Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// @dart=2.9
+
 extension Extension on String {
   int get noSuchMethod => 42;
   void set hashCode(int value) {}
-  int runtimeType() {}
+  int runtimeType() => 0;
   operator ==(other) => false;
   static String toString() => 'Foo';
 }

pkg/front_end/testcases/extensions/conflict_with_object.dart.textual_outline.expect

@@ -1,8 +1,7 @@
-// @dart = 2.9
 extension Extension on String {
   int get noSuchMethod => 42;
   void set hashCode(int value) {}
-  int runtimeType() {}
+  int runtimeType() => 0;
   operator ==(other) => false;
   static String toString() => 'Foo';
 }

pkg/front_end/testcases/extensions/conflict_with_object.dart.textual_outline_modelled.expect

@@ -1,10 +1,9 @@
-// @dart = 2.9
 errors() {}
 expect(expected, actual) {}
 
 extension Extension on String {
   int get noSuchMethod => 42;
-  int runtimeType() {}
+  int runtimeType() => 0;
   operator ==(other) => false;
   static String toString() => 'Foo';
   void set hashCode(int value) {}

pkg/front_end/testcases/extensions/conflict_with_object.dart.weak.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -7,7 +7,7 @@ library;
 //           ^^^^^^^^^^^^
 //
 // pkg/front_end/testcases/extensions/conflict_with_object.dart:8:7: Error: This extension member conflicts with Object member 'runtimeType'.
-//   int runtimeType() {}
+//   int runtimeType() => 0;
 //       ^^^^^^^^^^^
 //
 // pkg/front_end/testcases/extensions/conflict_with_object.dart:9:12: Error: This extension member conflicts with Object member '=='.
@@ -40,7 +40,7 @@ library;
 import self as self;
 import "dart:core" as core;
 
-extension Extension on core::String* {
+extension Extension on core::String {
   get noSuchMethod = self::Extension|get#noSuchMethod;
   method runtimeType = self::Extension|runtimeType;
   tearoff runtimeType = self::Extension|get#runtimeType;
@@ -48,33 +48,34 @@ extension Extension on core::String* {
   static method toString = self::Extension|toString;
   set hashCode = self::Extension|set#hashCode;
 }
-static method Extension|get#noSuchMethod(lowered final core::String* #this) → core::int*
+static method Extension|get#noSuchMethod(lowered final core::String #this) → core::int
   return 42;
-static method Extension|set#hashCode(lowered final core::String* #this, core::int* value) → void {}
-static method Extension|runtimeType(lowered final core::String* #this) → core::int* {}
-static method Extension|get#runtimeType(lowered final core::String* #this) → () →* core::int*
-  return () → core::int* => self::Extension|runtimeType(#this);
-static method Extension|==(lowered final core::String* #this, dynamic other) → dynamic
+static method Extension|set#hashCode(lowered final core::String #this, core::int value) → void {}
+static method Extension|runtimeType(lowered final core::String #this) → core::int
+  return 0;
+static method Extension|get#runtimeType(lowered final core::String #this) → () → core::int
+  return () → core::int => self::Extension|runtimeType(#this);
+static method Extension|==(lowered final core::String #this, dynamic other) → dynamic
   return false;
-static method Extension|toString() → core::String*
+static method Extension|toString() → core::String
   return "Foo";
 static method main() → dynamic {
-  core::int* value;
-  self::expect(true, "".{core::Object::noSuchMethod}{(core::Invocation*) →* dynamic} is core::Function*);
+  core::int value;
+  self::expect(true, "".{core::Object::noSuchMethod}{(core::Invocation) → dynamic} is{ForNonNullableByDefault} core::Function);
   value = self::Extension|get#noSuchMethod("");
   self::Extension|set#hashCode("", 42);
-  self::expect(true, "".{core::Object::runtimeType}{core::Type*} is core::Type*);
-  self::expect(true, self::Extension|get#runtimeType("") is core::Function*);
+  self::expect(true, "".{core::Object::runtimeType}{core::Type} is{ForNonNullableByDefault} core::Type);
+  self::expect(true, self::Extension|get#runtimeType("") is{ForNonNullableByDefault} core::Function);
   value = self::Extension|runtimeType("");
-  self::expect(true, "" =={core::String::==}{(core::Object*) →* core::bool*} "");
+  self::expect(true, "" =={core::String::==}{(core::Object) → core::bool} "");
   self::expect("Foo", self::Extension|toString());
 }
 static method errors() → dynamic {
-  core::int* value;
+  core::int value;
   value = invalid-expression "pkg/front_end/testcases/extensions/conflict_with_object.dart:27:14: Error: A value of type 'dynamic Function(Invocation)' can't be assigned to a variable of type 'int'.
  - 'Invocation' is from 'dart:core'.
   value = \"\".noSuchMethod;
-             ^" in "".{core::Object::noSuchMethod}{(core::Invocation*) →* dynamic} as{TypeError} core::int*;
+             ^" in "".{core::Object::noSuchMethod}{(core::Invocation) → dynamic} as{TypeError,ForNonNullableByDefault} core::int;
   invalid-expression "pkg/front_end/testcases/extensions/conflict_with_object.dart:28:6: Error: The setter 'hashCode' isn't defined for the class 'String'.
 Try correcting the name to the name of an existing setter, or defining a setter or field named 'hashCode'.
   \"\".hashCode = 42;
@@ -82,10 +83,10 @@ Try correcting the name to the name of an existing setter, or defining a setter
   value = invalid-expression "pkg/front_end/testcases/extensions/conflict_with_object.dart:29:14: Error: A value of type 'Type' can't be assigned to a variable of type 'int'.
  - 'Type' is from 'dart:core'.
   value = \"\".runtimeType;
-             ^" in "".{core::Object::runtimeType}{core::Type*} as{TypeError} core::int*;
+             ^" in "".{core::Object::runtimeType}{core::Type} as{TypeError,ForNonNullableByDefault} core::int;
 }
 static method expect(dynamic expected, dynamic actual) → dynamic {
-  if(!(expected =={core::Object::==}{(core::Object*) →* core::bool*} actual)) {
+  if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual)) {
     throw "Mismatch: expected=${expected}, actual=${actual}";
   }
 }

pkg/front_end/testcases/extensions/conflict_with_object.dart.weak.modular.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -7,7 +7,7 @@ library;
 //           ^^^^^^^^^^^^
 //
 // pkg/front_end/testcases/extensions/conflict_with_object.dart:8:7: Error: This extension member conflicts with Object member 'runtimeType'.
-//   int runtimeType() {}
+//   int runtimeType() => 0;
 //       ^^^^^^^^^^^
 //
 // pkg/front_end/testcases/extensions/conflict_with_object.dart:9:12: Error: This extension member conflicts with Object member '=='.
@@ -40,7 +40,7 @@ library;
 import self as self;
 import "dart:core" as core;
 
-extension Extension on core::String* {
+extension Extension on core::String {
   get noSuchMethod = self::Extension|get#noSuchMethod;
   method runtimeType = self::Extension|runtimeType;
   tearoff runtimeType = self::Extension|get#runtimeType;
@@ -48,33 +48,34 @@ extension Extension on core::String* {
   static method toString = self::Extension|toString;
   set hashCode = self::Extension|set#hashCode;
 }
-static method Extension|get#noSuchMethod(lowered final core::String* #this) → core::int*
+static method Extension|get#noSuchMethod(lowered final core::String #this) → core::int
   return 42;
-static method Extension|set#hashCode(lowered final core::String* #this, core::int* value) → void {}
-static method Extension|runtimeType(lowered final core::String* #this) → core::int* {}
-static method Extension|get#runtimeType(lowered final core::String* #this) → () →* core::int*
-  return () → core::int* => self::Extension|runtimeType(#this);
-static method Extension|==(lowered final core::String* #this, dynamic other) → dynamic
+static method Extension|set#hashCode(lowered final core::String #this, core::int value) → void {}
+static method Extension|runtimeType(lowered final core::String #this) → core::int
+  return 0;
+static method Extension|get#runtimeType(lowered final core::String #this) → () → core::int
+  return () → core::int => self::Extension|runtimeType(#this);
+static method Extension|==(lowered final core::String #this, dynamic other) → dynamic
   return false;
-static method Extension|toString() → core::String*
+static method Extension|toString() → core::String
   return "Foo";
 static method main() → dynamic {
-  core::int* value;
-  self::expect(true, "".{core::Object::noSuchMethod}{(core::Invocation*) →* dynamic} is core::Function*);
+  core::int value;
+  self::expect(true, "".{core::Object::noSuchMethod}{(core::Invocation) → dynamic} is{ForNonNullableByDefault} core::Function);
   value = self::Extension|get#noSuchMethod("");
   self::Extension|set#hashCode("", 42);
-  self::expect(true, "".{core::Object::runtimeType}{core::Type*} is core::Type*);
-  self::expect(true, self::Extension|get#runtimeType("") is core::Function*);
+  self::expect(true, "".{core::Object::runtimeType}{core::Type} is{ForNonNullableByDefault} core::Type);
+  self::expect(true, self::Extension|get#runtimeType("") is{ForNonNullableByDefault} core::Function);
   value = self::Extension|runtimeType("");
-  self::expect(true, "" =={core::String::==}{(core::Object*) →* core::bool*} "");
+  self::expect(true, "" =={core::String::==}{(core::Object) → core::bool} "");
   self::expect("Foo", self::Extension|toString());
 }
 static method errors() → dynamic {
-  core::int* value;
+  core::int value;
   value = invalid-expression "pkg/front_end/testcases/extensions/conflict_with_object.dart:27:14: Error: A value of type 'dynamic Function(Invocation)' can't be assigned to a variable of type 'int'.
  - 'Invocation' is from 'dart:core'.
   value = \"\".noSuchMethod;
-             ^" in "".{core::Object::noSuchMethod}{(core::Invocation*) →* dynamic} as{TypeError} core::int*;
+             ^" in "".{core::Object::noSuchMethod}{(core::Invocation) → dynamic} as{TypeError,ForNonNullableByDefault} core::int;
   invalid-expression "pkg/front_end/testcases/extensions/conflict_with_object.dart:28:6: Error: The setter 'hashCode' isn't defined for the class 'String'.
 Try correcting the name to the name of an existing setter, or defining a setter or field named 'hashCode'.
   \"\".hashCode = 42;
@@ -82,10 +83,10 @@ Try correcting the name to the name of an existing setter, or defining a setter
   value = invalid-expression "pkg/front_end/testcases/extensions/conflict_with_object.dart:29:14: Error: A value of type 'Type' can't be assigned to a variable of type 'int'.
  - 'Type' is from 'dart:core'.
   value = \"\".runtimeType;
-             ^" in "".{core::Object::runtimeType}{core::Type*} as{TypeError} core::int*;
+             ^" in "".{core::Object::runtimeType}{core::Type} as{TypeError,ForNonNullableByDefault} core::int;
 }
 static method expect(dynamic expected, dynamic actual) → dynamic {
-  if(!(expected =={core::Object::==}{(core::Object*) →* core::bool*} actual)) {
+  if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual)) {
     throw "Mismatch: expected=${expected}, actual=${actual}";
   }
 }

pkg/front_end/testcases/extensions/conflict_with_object.dart.weak.outline.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -7,7 +7,7 @@ library;
 //           ^^^^^^^^^^^^
 //
 // pkg/front_end/testcases/extensions/conflict_with_object.dart:8:7: Error: This extension member conflicts with Object member 'runtimeType'.
-//   int runtimeType() {}
+//   int runtimeType() => 0;
 //       ^^^^^^^^^^^
 //
 // pkg/front_end/testcases/extensions/conflict_with_object.dart:9:12: Error: This extension member conflicts with Object member '=='.
@@ -25,7 +25,7 @@ library;
 import self as self;
 import "dart:core" as core;
 
-extension Extension on core::String* {
+extension Extension on core::String {
   get noSuchMethod = self::Extension|get#noSuchMethod;
   method runtimeType = self::Extension|runtimeType;
   tearoff runtimeType = self::Extension|get#runtimeType;
@@ -33,17 +33,17 @@ extension Extension on core::String* {
   static method toString = self::Extension|toString;
   set hashCode = self::Extension|set#hashCode;
 }
-static method Extension|get#noSuchMethod(lowered final core::String* #this) → core::int*
+static method Extension|get#noSuchMethod(lowered final core::String #this) → core::int
   ;
-static method Extension|set#hashCode(lowered final core::String* #this, core::int* value) → void
+static method Extension|set#hashCode(lowered final core::String #this, core::int value) → void
   ;
-static method Extension|runtimeType(lowered final core::String* #this) → core::int*
+static method Extension|runtimeType(lowered final core::String #this) → core::int
   ;
-static method Extension|get#runtimeType(lowered final core::String* #this) → () →* core::int*
-  return () → core::int* => self::Extension|runtimeType(#this);
-static method Extension|==(lowered final core::String* #this, dynamic other) → dynamic
+static method Extension|get#runtimeType(lowered final core::String #this) → () → core::int
+  return () → core::int => self::Extension|runtimeType(#this);
+static method Extension|==(lowered final core::String #this, dynamic other) → dynamic
   ;
-static method Extension|toString() → core::String*
+static method Extension|toString() → core::String
   ;
 static method main() → dynamic
   ;

pkg/front_end/testcases/extensions/conflict_with_object.dart.weak.transformed.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -7,7 +7,7 @@ library;
 //           ^^^^^^^^^^^^
 //
 // pkg/front_end/testcases/extensions/conflict_with_object.dart:8:7: Error: This extension member conflicts with Object member 'runtimeType'.
-//   int runtimeType() {}
+//   int runtimeType() => 0;
 //       ^^^^^^^^^^^
 //
 // pkg/front_end/testcases/extensions/conflict_with_object.dart:9:12: Error: This extension member conflicts with Object member '=='.
@@ -40,7 +40,7 @@ library;
 import self as self;
 import "dart:core" as core;
 
-extension Extension on core::String* {
+extension Extension on core::String {
   get noSuchMethod = self::Extension|get#noSuchMethod;
   method runtimeType = self::Extension|runtimeType;
   tearoff runtimeType = self::Extension|get#runtimeType;
@@ -48,33 +48,34 @@ extension Extension on core::String* {
   static method toString = self::Extension|toString;
   set hashCode = self::Extension|set#hashCode;
 }
-static method Extension|get#noSuchMethod(lowered final core::String* #this) → core::int*
+static method Extension|get#noSuchMethod(lowered final core::String #this) → core::int
   return 42;
-static method Extension|set#hashCode(lowered final core::String* #this, core::int* value) → void {}
-static method Extension|runtimeType(lowered final core::String* #this) → core::int* {}
-static method Extension|get#runtimeType(lowered final core::String* #this) → () →* core::int*
-  return () → core::int* => self::Extension|runtimeType(#this);
-static method Extension|==(lowered final core::String* #this, dynamic other) → dynamic
+static method Extension|set#hashCode(lowered final core::String #this, core::int value) → void {}
+static method Extension|runtimeType(lowered final core::String #this) → core::int
+  return 0;
+static method Extension|get#runtimeType(lowered final core::String #this) → () → core::int
+  return () → core::int => self::Extension|runtimeType(#this);
+static method Extension|==(lowered final core::String #this, dynamic other) → dynamic
   return false;
-static method Extension|toString() → core::String*
+static method Extension|toString() → core::String
   return "Foo";
 static method main() → dynamic {
-  core::int* value;
-  self::expect(true, "".{core::Object::noSuchMethod}{(core::Invocation*) →* dynamic} is core::Function*);
+  core::int value;
+  self::expect(true, "".{core::Object::noSuchMethod}{(core::Invocation) → dynamic} is{ForNonNullableByDefault} core::Function);
   value = self::Extension|get#noSuchMethod("");
   self::Extension|set#hashCode("", 42);
-  self::expect(true, "".{core::Object::runtimeType}{core::Type*} is core::Type*);
-  self::expect(true, self::Extension|get#runtimeType("") is core::Function*);
+  self::expect(true, "".{core::Object::runtimeType}{core::Type} is{ForNonNullableByDefault} core::Type);
+  self::expect(true, self::Extension|get#runtimeType("") is{ForNonNullableByDefault} core::Function);
   value = self::Extension|runtimeType("");
-  self::expect(true, "" =={core::String::==}{(core::Object*) →* core::bool*} "");
+  self::expect(true, "" =={core::String::==}{(core::Object) → core::bool} "");
   self::expect("Foo", self::Extension|toString());
 }
 static method errors() → dynamic {
-  core::int* value;
+  core::int value;
   value = invalid-expression "pkg/front_end/testcases/extensions/conflict_with_object.dart:27:14: Error: A value of type 'dynamic Function(Invocation)' can't be assigned to a variable of type 'int'.
  - 'Invocation' is from 'dart:core'.
   value = \"\".noSuchMethod;
-             ^" in "".{core::Object::noSuchMethod}{(core::Invocation*) →* dynamic} as{TypeError} core::int*;
+             ^" in "".{core::Object::noSuchMethod}{(core::Invocation) → dynamic} as{TypeError,ForNonNullableByDefault} core::int;
   invalid-expression "pkg/front_end/testcases/extensions/conflict_with_object.dart:28:6: Error: The setter 'hashCode' isn't defined for the class 'String'.
 Try correcting the name to the name of an existing setter, or defining a setter or field named 'hashCode'.
   \"\".hashCode = 42;
@@ -82,10 +83,10 @@ Try correcting the name to the name of an existing setter, or defining a setter
   value = invalid-expression "pkg/front_end/testcases/extensions/conflict_with_object.dart:29:14: Error: A value of type 'Type' can't be assigned to a variable of type 'int'.
  - 'Type' is from 'dart:core'.
   value = \"\".runtimeType;
-             ^" in "".{core::Object::runtimeType}{core::Type*} as{TypeError} core::int*;
+             ^" in "".{core::Object::runtimeType}{core::Type} as{TypeError,ForNonNullableByDefault} core::int;
 }
 static method expect(dynamic expected, dynamic actual) → dynamic {
-  if(!(expected =={core::Object::==}{(core::Object*) →* core::bool*} actual)) {
+  if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual)) {
     throw "Mismatch: expected=${expected}, actual=${actual}";
   }
 }

pkg/front_end/testcases/extensions/conflicts.dart

@@ -1,7 +1,7 @@
 // Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// @dart=2.9
+
 class Class1 {
 }
 class Class2 {}

pkg/front_end/testcases/extensions/conflicts.dart.textual_outline.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 class Class1 {}
 
 class Class2 {}

pkg/front_end/testcases/extensions/conflicts.dart.textual_outline_modelled.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 class Class1 {}
 
 class Class2 {}

pkg/front_end/testcases/extensions/conflicts.dart.weak.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -26,62 +26,42 @@ import self as self;
 import "dart:core" as core;
 
 class Class1 extends core::Object {
-  synthetic constructor •() → self::Class1*
+  synthetic constructor •() → self::Class1
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
 class Class2 extends core::Object {
-  synthetic constructor •() → self::Class2*
+  synthetic constructor •() → self::Class2
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension DuplicateExtensionName on self::Class1* {
+extension DuplicateExtensionName on self::Class1 {
   method uniqueMethod1 = self::DuplicateExtensionName|uniqueMethod1;
   tearoff uniqueMethod1 = self::DuplicateExtensionName|get#uniqueMethod1;
   method duplicateMethodName2 = self::DuplicateExtensionName|duplicateMethodName2;
   tearoff duplicateMethodName2 = self::DuplicateExtensionName|get#duplicateMethodName2;
 }
-extension UniqueExtensionName on self::Class1* {
+extension UniqueExtensionName on self::Class1 {
   method duplicateMethodName1 = self::UniqueExtensionName|duplicateMethodName1;
   tearoff duplicateMethodName1 = self::UniqueExtensionName|get#duplicateMethodName1;
 }
-static method DuplicateExtensionName|uniqueMethod1(lowered final self::Class1* #this) → dynamic {}
-static method DuplicateExtensionName|get#uniqueMethod1(lowered final self::Class1* #this) → () →* dynamic
+static method DuplicateExtensionName|uniqueMethod1(lowered final self::Class1 #this) → dynamic {}
+static method DuplicateExtensionName|get#uniqueMethod1(lowered final self::Class1 #this) → () → dynamic
   return () → dynamic => self::DuplicateExtensionName|uniqueMethod1(#this);
-static method DuplicateExtensionName|duplicateMethodName2(lowered final self::Class1* #this) → dynamic
+static method DuplicateExtensionName|duplicateMethodName2(lowered final self::Class1 #this) → dynamic
   return 1;
-static method DuplicateExtensionName|get#duplicateMethodName2(lowered final self::Class1* #this) → () →* dynamic
+static method DuplicateExtensionName|get#duplicateMethodName2(lowered final self::Class1 #this) → () → dynamic
   return () → dynamic => self::DuplicateExtensionName|duplicateMethodName2(#this);
-static method UniqueExtensionName|duplicateMethodName1(lowered final self::Class1* #this) → dynamic
+static method UniqueExtensionName|duplicateMethodName1(lowered final self::Class1 #this) → dynamic
   return 1;
-static method UniqueExtensionName|get#duplicateMethodName1(lowered final self::Class1* #this) → () →* dynamic
+static method UniqueExtensionName|get#duplicateMethodName1(lowered final self::Class1 #this) → () → dynamic
   return () → dynamic => self::UniqueExtensionName|duplicateMethodName1(#this);
 static method main() → dynamic {
-  self::Class1* c1 = new self::Class1::•();
+  self::Class1 c1 = new self::Class1::•();
   self::DuplicateExtensionName|uniqueMethod1(c1);
 }
 static method errors() → dynamic {
-  self::Class2* c2 = new self::Class2::•();
+  self::Class2 c2 = new self::Class2::•();
   invalid-expression "pkg/front_end/testcases/extensions/conflicts.dart:31:6: Error: The method 'uniqueMethod2' isn't defined for the class 'Class2'.
  - 'Class2' is from 'pkg/front_end/testcases/extensions/conflicts.dart'.
 Try correcting the name to the name of an existing method, or defining a method named 'uniqueMethod2'.

pkg/front_end/testcases/extensions/conflicts.dart.weak.modular.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -26,62 +26,42 @@ import self as self;
 import "dart:core" as core;
 
 class Class1 extends core::Object {
-  synthetic constructor •() → self::Class1*
+  synthetic constructor •() → self::Class1
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
 class Class2 extends core::Object {
-  synthetic constructor •() → self::Class2*
+  synthetic constructor •() → self::Class2
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension DuplicateExtensionName on self::Class1* {
+extension DuplicateExtensionName on self::Class1 {
   method uniqueMethod1 = self::DuplicateExtensionName|uniqueMethod1;
   tearoff uniqueMethod1 = self::DuplicateExtensionName|get#uniqueMethod1;
   method duplicateMethodName2 = self::DuplicateExtensionName|duplicateMethodName2;
   tearoff duplicateMethodName2 = self::DuplicateExtensionName|get#duplicateMethodName2;
 }
-extension UniqueExtensionName on self::Class1* {
+extension UniqueExtensionName on self::Class1 {
   method duplicateMethodName1 = self::UniqueExtensionName|duplicateMethodName1;
   tearoff duplicateMethodName1 = self::UniqueExtensionName|get#duplicateMethodName1;
 }
-static method DuplicateExtensionName|uniqueMethod1(lowered final self::Class1* #this) → dynamic {}
-static method DuplicateExtensionName|get#uniqueMethod1(lowered final self::Class1* #this) → () →* dynamic
+static method DuplicateExtensionName|uniqueMethod1(lowered final self::Class1 #this) → dynamic {}
+static method DuplicateExtensionName|get#uniqueMethod1(lowered final self::Class1 #this) → () → dynamic
   return () → dynamic => self::DuplicateExtensionName|uniqueMethod1(#this);
-static method DuplicateExtensionName|duplicateMethodName2(lowered final self::Class1* #this) → dynamic
+static method DuplicateExtensionName|duplicateMethodName2(lowered final self::Class1 #this) → dynamic
   return 1;
-static method DuplicateExtensionName|get#duplicateMethodName2(lowered final self::Class1* #this) → () →* dynamic
+static method DuplicateExtensionName|get#duplicateMethodName2(lowered final self::Class1 #this) → () → dynamic
   return () → dynamic => self::DuplicateExtensionName|duplicateMethodName2(#this);
-static method UniqueExtensionName|duplicateMethodName1(lowered final self::Class1* #this) → dynamic
+static method UniqueExtensionName|duplicateMethodName1(lowered final self::Class1 #this) → dynamic
   return 1;
-static method UniqueExtensionName|get#duplicateMethodName1(lowered final self::Class1* #this) → () →* dynamic
+static method UniqueExtensionName|get#duplicateMethodName1(lowered final self::Class1 #this) → () → dynamic
   return () → dynamic => self::UniqueExtensionName|duplicateMethodName1(#this);
 static method main() → dynamic {
-  self::Class1* c1 = new self::Class1::•();
+  self::Class1 c1 = new self::Class1::•();
   self::DuplicateExtensionName|uniqueMethod1(c1);
 }
 static method errors() → dynamic {
-  self::Class2* c2 = new self::Class2::•();
+  self::Class2 c2 = new self::Class2::•();
   invalid-expression "pkg/front_end/testcases/extensions/conflicts.dart:31:6: Error: The method 'uniqueMethod2' isn't defined for the class 'Class2'.
  - 'Class2' is from 'pkg/front_end/testcases/extensions/conflicts.dart'.
 Try correcting the name to the name of an existing method, or defining a method named 'uniqueMethod2'.

pkg/front_end/testcases/extensions/conflicts.dart.weak.outline.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -20,54 +20,34 @@ import self as self;
 import "dart:core" as core;
 
 class Class1 extends core::Object {
-  synthetic constructor •() → self::Class1*
+  synthetic constructor •() → self::Class1
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
 class Class2 extends core::Object {
-  synthetic constructor •() → self::Class2*
+  synthetic constructor •() → self::Class2
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension DuplicateExtensionName on self::Class1* {
+extension DuplicateExtensionName on self::Class1 {
   method uniqueMethod1 = self::DuplicateExtensionName|uniqueMethod1;
   tearoff uniqueMethod1 = self::DuplicateExtensionName|get#uniqueMethod1;
   method duplicateMethodName2 = self::DuplicateExtensionName|duplicateMethodName2;
   tearoff duplicateMethodName2 = self::DuplicateExtensionName|get#duplicateMethodName2;
 }
-extension UniqueExtensionName on self::Class1* {
+extension UniqueExtensionName on self::Class1 {
   method duplicateMethodName1 = self::UniqueExtensionName|duplicateMethodName1;
   tearoff duplicateMethodName1 = self::UniqueExtensionName|get#duplicateMethodName1;
 }
-static method DuplicateExtensionName|uniqueMethod1(lowered final self::Class1* #this) → dynamic
+static method DuplicateExtensionName|uniqueMethod1(lowered final self::Class1 #this) → dynamic
   ;
-static method DuplicateExtensionName|get#uniqueMethod1(lowered final self::Class1* #this) → () →* dynamic
+static method DuplicateExtensionName|get#uniqueMethod1(lowered final self::Class1 #this) → () → dynamic
   return () → dynamic => self::DuplicateExtensionName|uniqueMethod1(#this);
-static method DuplicateExtensionName|duplicateMethodName2(lowered final self::Class1* #this) → dynamic
+static method DuplicateExtensionName|duplicateMethodName2(lowered final self::Class1 #this) → dynamic
   ;
-static method DuplicateExtensionName|get#duplicateMethodName2(lowered final self::Class1* #this) → () →* dynamic
+static method DuplicateExtensionName|get#duplicateMethodName2(lowered final self::Class1 #this) → () → dynamic
   return () → dynamic => self::DuplicateExtensionName|duplicateMethodName2(#this);
-static method UniqueExtensionName|duplicateMethodName1(lowered final self::Class1* #this) → dynamic
+static method UniqueExtensionName|duplicateMethodName1(lowered final self::Class1 #this) → dynamic
   ;
-static method UniqueExtensionName|get#duplicateMethodName1(lowered final self::Class1* #this) → () →* dynamic
+static method UniqueExtensionName|get#duplicateMethodName1(lowered final self::Class1 #this) → () → dynamic
   return () → dynamic => self::UniqueExtensionName|duplicateMethodName1(#this);
 static method main() → dynamic
   ;

pkg/front_end/testcases/extensions/conflicts.dart.weak.transformed.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -26,62 +26,42 @@ import self as self;
 import "dart:core" as core;
 
 class Class1 extends core::Object {
-  synthetic constructor •() → self::Class1*
+  synthetic constructor •() → self::Class1
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
 class Class2 extends core::Object {
-  synthetic constructor •() → self::Class2*
+  synthetic constructor •() → self::Class2
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension DuplicateExtensionName on self::Class1* {
+extension DuplicateExtensionName on self::Class1 {
   method uniqueMethod1 = self::DuplicateExtensionName|uniqueMethod1;
   tearoff uniqueMethod1 = self::DuplicateExtensionName|get#uniqueMethod1;
   method duplicateMethodName2 = self::DuplicateExtensionName|duplicateMethodName2;
   tearoff duplicateMethodName2 = self::DuplicateExtensionName|get#duplicateMethodName2;
 }
-extension UniqueExtensionName on self::Class1* {
+extension UniqueExtensionName on self::Class1 {
   method duplicateMethodName1 = self::UniqueExtensionName|duplicateMethodName1;
   tearoff duplicateMethodName1 = self::UniqueExtensionName|get#duplicateMethodName1;
 }
-static method DuplicateExtensionName|uniqueMethod1(lowered final self::Class1* #this) → dynamic {}
-static method DuplicateExtensionName|get#uniqueMethod1(lowered final self::Class1* #this) → () →* dynamic
+static method DuplicateExtensionName|uniqueMethod1(lowered final self::Class1 #this) → dynamic {}
+static method DuplicateExtensionName|get#uniqueMethod1(lowered final self::Class1 #this) → () → dynamic
   return () → dynamic => self::DuplicateExtensionName|uniqueMethod1(#this);
-static method DuplicateExtensionName|duplicateMethodName2(lowered final self::Class1* #this) → dynamic
+static method DuplicateExtensionName|duplicateMethodName2(lowered final self::Class1 #this) → dynamic
   return 1;
-static method DuplicateExtensionName|get#duplicateMethodName2(lowered final self::Class1* #this) → () →* dynamic
+static method DuplicateExtensionName|get#duplicateMethodName2(lowered final self::Class1 #this) → () → dynamic
   return () → dynamic => self::DuplicateExtensionName|duplicateMethodName2(#this);
-static method UniqueExtensionName|duplicateMethodName1(lowered final self::Class1* #this) → dynamic
+static method UniqueExtensionName|duplicateMethodName1(lowered final self::Class1 #this) → dynamic
   return 1;
-static method UniqueExtensionName|get#duplicateMethodName1(lowered final self::Class1* #this) → () →* dynamic
+static method UniqueExtensionName|get#duplicateMethodName1(lowered final self::Class1 #this) → () → dynamic
   return () → dynamic => self::UniqueExtensionName|duplicateMethodName1(#this);
 static method main() → dynamic {
-  self::Class1* c1 = new self::Class1::•();
+  self::Class1 c1 = new self::Class1::•();
   self::DuplicateExtensionName|uniqueMethod1(c1);
 }
 static method errors() → dynamic {
-  self::Class2* c2 = new self::Class2::•();
+  self::Class2 c2 = new self::Class2::•();
   invalid-expression "pkg/front_end/testcases/extensions/conflicts.dart:31:6: Error: The method 'uniqueMethod2' isn't defined for the class 'Class2'.
  - 'Class2' is from 'pkg/front_end/testcases/extensions/conflicts.dart'.
 Try correcting the name to the name of an existing method, or defining a method named 'uniqueMethod2'.

pkg/front_end/testcases/extensions/default_values.dart

@@ -1,7 +1,7 @@
 // Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// @dart=2.9
+
 class Class {}
 
 extension Extension on Class {

pkg/front_end/testcases/extensions/default_values.dart.textual_outline.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 class Class {}
 
 extension Extension on Class {

pkg/front_end/testcases/extensions/default_values.dart.textual_outline_modelled.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 class Class {}
 
 expect(expected, actual) {}

pkg/front_end/testcases/extensions/default_values.dart.weak.expect

@@ -1,23 +1,13 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 class Class extends core::Object {
-  synthetic constructor •() → self::Class*
+  synthetic constructor •() → self::Class
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension Extension on self::Class* {
+extension Extension on self::Class {
   method method0 = self::Extension|method0;
   tearoff method0 = self::Extension|get#method0;
   method method1 = self::Extension|method1;
@@ -28,41 +18,41 @@ extension Extension on self::Class* {
   tearoff method3 = self::Extension|get#method3;
   static method staticMethod = self::Extension|staticMethod;
 }
-static method Extension|method0(lowered final self::Class* #this, [dynamic a = #C1]) → dynamic
+static method Extension|method0(lowered final self::Class #this, [dynamic a = #C1]) → dynamic
   return a;
-static method Extension|get#method0(lowered final self::Class* #this) → ([dynamic]) →* dynamic
+static method Extension|get#method0(lowered final self::Class #this) → ([dynamic]) → dynamic
   return ([dynamic a = #C1]) → dynamic => self::Extension|method0(#this, a);
-static method Extension|method1(lowered final self::Class* #this, [dynamic a = #C2]) → dynamic
+static method Extension|method1(lowered final self::Class #this, [dynamic a = #C2]) → dynamic
   return a;
-static method Extension|get#method1(lowered final self::Class* #this) → ([dynamic]) →* dynamic
+static method Extension|get#method1(lowered final self::Class #this) → ([dynamic]) → dynamic
   return ([dynamic a = #C2]) → dynamic => self::Extension|method1(#this, a);
-static method Extension|method2(lowered final self::Class* #this, {dynamic b = #C3}) → dynamic
+static method Extension|method2(lowered final self::Class #this, {dynamic b = #C3}) → dynamic
   return b;
-static method Extension|get#method2(lowered final self::Class* #this) → ({b: dynamic}) →* dynamic
+static method Extension|get#method2(lowered final self::Class #this) → ({b: dynamic}) → dynamic
   return ({dynamic b = #C3}) → dynamic => self::Extension|method2(#this, b: b);
-static method Extension|method3(lowered final self::Class* #this, {dynamic c = #C4}) → dynamic
+static method Extension|method3(lowered final self::Class #this, {dynamic c = #C4}) → dynamic
   return c{dynamic}.call();
-static method Extension|get#method3(lowered final self::Class* #this) → ({c: dynamic}) →* dynamic
+static method Extension|get#method3(lowered final self::Class #this) → ({c: dynamic}) → dynamic
   return ({dynamic c = #C4}) → dynamic => self::Extension|method3(#this, c: c);
 static method Extension|staticMethod() → dynamic
   return 123;
 static method main() → dynamic {
-  self::Class* c = new self::Class::•();
-  ([dynamic]) →* dynamic tearOff0 = self::Extension|get#method0(c);
-  self::expect(0, tearOff0(0){([dynamic]) →* dynamic});
-  self::expect(null, tearOff0(){([dynamic]) →* dynamic});
-  ([dynamic]) →* dynamic tearOff1 = self::Extension|get#method1(c);
-  self::expect(0, tearOff1(0){([dynamic]) →* dynamic});
-  self::expect(42, tearOff1(){([dynamic]) →* dynamic});
-  ({b: dynamic}) →* dynamic tearOff2 = self::Extension|get#method2(c);
-  self::expect(0, tearOff2(b: 0){({b: dynamic}) →* dynamic});
-  self::expect(87, tearOff2(){({b: dynamic}) →* dynamic});
-  ({c: dynamic}) →* dynamic tearOff3 = self::Extension|get#method3(c);
-  self::expect(0, tearOff3(c: () → core::int* => 0){({c: dynamic}) →* dynamic});
-  self::expect(123, tearOff3(){({c: dynamic}) →* dynamic});
+  self::Class c = new self::Class::•();
+  ([dynamic]) → dynamic tearOff0 = self::Extension|get#method0(c);
+  self::expect(0, tearOff0(0){([dynamic]) → dynamic});
+  self::expect(null, tearOff0(){([dynamic]) → dynamic});
+  ([dynamic]) → dynamic tearOff1 = self::Extension|get#method1(c);
+  self::expect(0, tearOff1(0){([dynamic]) → dynamic});
+  self::expect(42, tearOff1(){([dynamic]) → dynamic});
+  ({b: dynamic}) → dynamic tearOff2 = self::Extension|get#method2(c);
+  self::expect(0, tearOff2(b: 0){({b: dynamic}) → dynamic});
+  self::expect(87, tearOff2(){({b: dynamic}) → dynamic});
+  ({c: dynamic}) → dynamic tearOff3 = self::Extension|get#method3(c);
+  self::expect(0, tearOff3(c: () → core::int => 0){({c: dynamic}) → dynamic});
+  self::expect(123, tearOff3(){({c: dynamic}) → dynamic});
 }
 static method expect(dynamic expected, dynamic actual) → dynamic {
-  if(!(expected =={core::Object::==}{(core::Object*) →* core::bool*} actual)) {
+  if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual)) {
     throw "Mismatch: expected=${expected}, actual=${actual}";
   }
 }

pkg/front_end/testcases/extensions/default_values.dart.weak.modular.expect

@@ -1,23 +1,13 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 class Class extends core::Object {
-  synthetic constructor •() → self::Class*
+  synthetic constructor •() → self::Class
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension Extension on self::Class* {
+extension Extension on self::Class {
   method method0 = self::Extension|method0;
   tearoff method0 = self::Extension|get#method0;
   method method1 = self::Extension|method1;
@@ -28,41 +18,41 @@ extension Extension on self::Class* {
   tearoff method3 = self::Extension|get#method3;
   static method staticMethod = self::Extension|staticMethod;
 }
-static method Extension|method0(lowered final self::Class* #this, [dynamic a = #C1]) → dynamic
+static method Extension|method0(lowered final self::Class #this, [dynamic a = #C1]) → dynamic
   return a;
-static method Extension|get#method0(lowered final self::Class* #this) → ([dynamic]) →* dynamic
+static method Extension|get#method0(lowered final self::Class #this) → ([dynamic]) → dynamic
   return ([dynamic a = #C1]) → dynamic => self::Extension|method0(#this, a);
-static method Extension|method1(lowered final self::Class* #this, [dynamic a = #C2]) → dynamic
+static method Extension|method1(lowered final self::Class #this, [dynamic a = #C2]) → dynamic
   return a;
-static method Extension|get#method1(lowered final self::Class* #this) → ([dynamic]) →* dynamic
+static method Extension|get#method1(lowered final self::Class #this) → ([dynamic]) → dynamic
   return ([dynamic a = #C2]) → dynamic => self::Extension|method1(#this, a);
-static method Extension|method2(lowered final self::Class* #this, {dynamic b = #C3}) → dynamic
+static method Extension|method2(lowered final self::Class #this, {dynamic b = #C3}) → dynamic
   return b;
-static method Extension|get#method2(lowered final self::Class* #this) → ({b: dynamic}) →* dynamic
+static method Extension|get#method2(lowered final self::Class #this) → ({b: dynamic}) → dynamic
   return ({dynamic b = #C3}) → dynamic => self::Extension|method2(#this, b: b);
-static method Extension|method3(lowered final self::Class* #this, {dynamic c = #C4}) → dynamic
+static method Extension|method3(lowered final self::Class #this, {dynamic c = #C4}) → dynamic
   return c{dynamic}.call();
-static method Extension|get#method3(lowered final self::Class* #this) → ({c: dynamic}) →* dynamic
+static method Extension|get#method3(lowered final self::Class #this) → ({c: dynamic}) → dynamic
   return ({dynamic c = #C4}) → dynamic => self::Extension|method3(#this, c: c);
 static method Extension|staticMethod() → dynamic
   return 123;
 static method main() → dynamic {
-  self::Class* c = new self::Class::•();
-  ([dynamic]) →* dynamic tearOff0 = self::Extension|get#method0(c);
-  self::expect(0, tearOff0(0){([dynamic]) →* dynamic});
-  self::expect(null, tearOff0(){([dynamic]) →* dynamic});
-  ([dynamic]) →* dynamic tearOff1 = self::Extension|get#method1(c);
-  self::expect(0, tearOff1(0){([dynamic]) →* dynamic});
-  self::expect(42, tearOff1(){([dynamic]) →* dynamic});
-  ({b: dynamic}) →* dynamic tearOff2 = self::Extension|get#method2(c);
-  self::expect(0, tearOff2(b: 0){({b: dynamic}) →* dynamic});
-  self::expect(87, tearOff2(){({b: dynamic}) →* dynamic});
-  ({c: dynamic}) →* dynamic tearOff3 = self::Extension|get#method3(c);
-  self::expect(0, tearOff3(c: () → core::int* => 0){({c: dynamic}) →* dynamic});
-  self::expect(123, tearOff3(){({c: dynamic}) →* dynamic});
+  self::Class c = new self::Class::•();
+  ([dynamic]) → dynamic tearOff0 = self::Extension|get#method0(c);
+  self::expect(0, tearOff0(0){([dynamic]) → dynamic});
+  self::expect(null, tearOff0(){([dynamic]) → dynamic});
+  ([dynamic]) → dynamic tearOff1 = self::Extension|get#method1(c);
+  self::expect(0, tearOff1(0){([dynamic]) → dynamic});
+  self::expect(42, tearOff1(){([dynamic]) → dynamic});
+  ({b: dynamic}) → dynamic tearOff2 = self::Extension|get#method2(c);
+  self::expect(0, tearOff2(b: 0){({b: dynamic}) → dynamic});
+  self::expect(87, tearOff2(){({b: dynamic}) → dynamic});
+  ({c: dynamic}) → dynamic tearOff3 = self::Extension|get#method3(c);
+  self::expect(0, tearOff3(c: () → core::int => 0){({c: dynamic}) → dynamic});
+  self::expect(123, tearOff3(){({c: dynamic}) → dynamic});
 }
 static method expect(dynamic expected, dynamic actual) → dynamic {
-  if(!(expected =={core::Object::==}{(core::Object*) →* core::bool*} actual)) {
+  if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual)) {
     throw "Mismatch: expected=${expected}, actual=${actual}";
   }
 }

pkg/front_end/testcases/extensions/default_values.dart.weak.outline.expect

@@ -1,22 +1,12 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 class Class extends core::Object {
-  synthetic constructor •() → self::Class*
+  synthetic constructor •() → self::Class
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension Extension on self::Class* {
+extension Extension on self::Class {
   method method0 = self::Extension|method0;
   tearoff method0 = self::Extension|get#method0;
   method method1 = self::Extension|method1;
@@ -27,21 +17,21 @@ extension Extension on self::Class* {
   tearoff method3 = self::Extension|get#method3;
   static method staticMethod = self::Extension|staticMethod;
 }
-static method Extension|method0(lowered final self::Class* #this, [dynamic a]) → dynamic
+static method Extension|method0(lowered final self::Class #this, [dynamic a]) → dynamic
   ;
-static method Extension|get#method0(lowered final self::Class* #this) → ([dynamic]) →* dynamic
+static method Extension|get#method0(lowered final self::Class #this) → ([dynamic]) → dynamic
   return ([dynamic a]) → dynamic => self::Extension|method0(#this, a);
-static method Extension|method1(lowered final self::Class* #this, [has-declared-initializer dynamic a]) → dynamic
+static method Extension|method1(lowered final self::Class #this, [has-declared-initializer dynamic a]) → dynamic
   ;
-static method Extension|get#method1(lowered final self::Class* #this) → ([dynamic]) →* dynamic
+static method Extension|get#method1(lowered final self::Class #this) → ([dynamic]) → dynamic
   return ([dynamic a]) → dynamic => self::Extension|method1(#this, a);
-static method Extension|method2(lowered final self::Class* #this, {has-declared-initializer dynamic b}) → dynamic
+static method Extension|method2(lowered final self::Class #this, {has-declared-initializer dynamic b}) → dynamic
   ;
-static method Extension|get#method2(lowered final self::Class* #this) → ({b: dynamic}) →* dynamic
+static method Extension|get#method2(lowered final self::Class #this) → ({b: dynamic}) → dynamic
   return ({dynamic b}) → dynamic => self::Extension|method2(#this, b: b);
-static method Extension|method3(lowered final self::Class* #this, {has-declared-initializer dynamic c}) → dynamic
+static method Extension|method3(lowered final self::Class #this, {has-declared-initializer dynamic c}) → dynamic
   ;
-static method Extension|get#method3(lowered final self::Class* #this) → ({c: dynamic}) →* dynamic
+static method Extension|get#method3(lowered final self::Class #this) → ({c: dynamic}) → dynamic
   return ({dynamic c}) → dynamic => self::Extension|method3(#this, c: c);
 static method Extension|staticMethod() → dynamic
   ;

pkg/front_end/testcases/extensions/default_values.dart.weak.transformed.expect

@@ -1,23 +1,13 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 class Class extends core::Object {
-  synthetic constructor •() → self::Class*
+  synthetic constructor •() → self::Class
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension Extension on self::Class* {
+extension Extension on self::Class {
   method method0 = self::Extension|method0;
   tearoff method0 = self::Extension|get#method0;
   method method1 = self::Extension|method1;
@@ -28,41 +18,41 @@ extension Extension on self::Class* {
   tearoff method3 = self::Extension|get#method3;
   static method staticMethod = self::Extension|staticMethod;
 }
-static method Extension|method0(lowered final self::Class* #this, [dynamic a = #C1]) → dynamic
+static method Extension|method0(lowered final self::Class #this, [dynamic a = #C1]) → dynamic
   return a;
-static method Extension|get#method0(lowered final self::Class* #this) → ([dynamic]) →* dynamic
+static method Extension|get#method0(lowered final self::Class #this) → ([dynamic]) → dynamic
   return ([dynamic a = #C1]) → dynamic => self::Extension|method0(#this, a);
-static method Extension|method1(lowered final self::Class* #this, [dynamic a = #C2]) → dynamic
+static method Extension|method1(lowered final self::Class #this, [dynamic a = #C2]) → dynamic
   return a;
-static method Extension|get#method1(lowered final self::Class* #this) → ([dynamic]) →* dynamic
+static method Extension|get#method1(lowered final self::Class #this) → ([dynamic]) → dynamic
   return ([dynamic a = #C2]) → dynamic => self::Extension|method1(#this, a);
-static method Extension|method2(lowered final self::Class* #this, {dynamic b = #C3}) → dynamic
+static method Extension|method2(lowered final self::Class #this, {dynamic b = #C3}) → dynamic
   return b;
-static method Extension|get#method2(lowered final self::Class* #this) → ({b: dynamic}) →* dynamic
+static method Extension|get#method2(lowered final self::Class #this) → ({b: dynamic}) → dynamic
   return ({dynamic b = #C3}) → dynamic => self::Extension|method2(#this, b: b);
-static method Extension|method3(lowered final self::Class* #this, {dynamic c = #C4}) → dynamic
+static method Extension|method3(lowered final self::Class #this, {dynamic c = #C4}) → dynamic
   return c{dynamic}.call();
-static method Extension|get#method3(lowered final self::Class* #this) → ({c: dynamic}) →* dynamic
+static method Extension|get#method3(lowered final self::Class #this) → ({c: dynamic}) → dynamic
   return ({dynamic c = #C4}) → dynamic => self::Extension|method3(#this, c: c);
 static method Extension|staticMethod() → dynamic
   return 123;
 static method main() → dynamic {
-  self::Class* c = new self::Class::•();
-  ([dynamic]) →* dynamic tearOff0 = self::Extension|get#method0(c);
-  self::expect(0, tearOff0(0){([dynamic]) →* dynamic});
-  self::expect(null, tearOff0(){([dynamic]) →* dynamic});
-  ([dynamic]) →* dynamic tearOff1 = self::Extension|get#method1(c);
-  self::expect(0, tearOff1(0){([dynamic]) →* dynamic});
-  self::expect(42, tearOff1(){([dynamic]) →* dynamic});
-  ({b: dynamic}) →* dynamic tearOff2 = self::Extension|get#method2(c);
-  self::expect(0, tearOff2(b: 0){({b: dynamic}) →* dynamic});
-  self::expect(87, tearOff2(){({b: dynamic}) →* dynamic});
-  ({c: dynamic}) →* dynamic tearOff3 = self::Extension|get#method3(c);
-  self::expect(0, tearOff3(c: () → core::int* => 0){({c: dynamic}) →* dynamic});
-  self::expect(123, tearOff3(){({c: dynamic}) →* dynamic});
+  self::Class c = new self::Class::•();
+  ([dynamic]) → dynamic tearOff0 = self::Extension|get#method0(c);
+  self::expect(0, tearOff0(0){([dynamic]) → dynamic});
+  self::expect(null, tearOff0(){([dynamic]) → dynamic});
+  ([dynamic]) → dynamic tearOff1 = self::Extension|get#method1(c);
+  self::expect(0, tearOff1(0){([dynamic]) → dynamic});
+  self::expect(42, tearOff1(){([dynamic]) → dynamic});
+  ({b: dynamic}) → dynamic tearOff2 = self::Extension|get#method2(c);
+  self::expect(0, tearOff2(b: 0){({b: dynamic}) → dynamic});
+  self::expect(87, tearOff2(){({b: dynamic}) → dynamic});
+  ({c: dynamic}) → dynamic tearOff3 = self::Extension|get#method3(c);
+  self::expect(0, tearOff3(c: () → core::int => 0){({c: dynamic}) → dynamic});
+  self::expect(123, tearOff3(){({c: dynamic}) → dynamic});
 }
 static method expect(dynamic expected, dynamic actual) → dynamic {
-  if(!(expected =={core::Object::==}{(core::Object*) →* core::bool*} actual)) {
+  if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual)) {
     throw "Mismatch: expected=${expected}, actual=${actual}";
   }
 }

pkg/front_end/testcases/extensions/deferred_explicit_access.dart

@@ -1,7 +1,7 @@
 // Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// @dart=2.9
+
 import 'deferred_explicit_access_lib.dart' deferred as prefix;
 
 main() async {

pkg/front_end/testcases/extensions/deferred_explicit_access.dart.textual_outline.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 import 'deferred_explicit_access_lib.dart' deferred as prefix;
 
 main() async {}

pkg/front_end/testcases/extensions/deferred_explicit_access.dart.textual_outline_modelled.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 import 'deferred_explicit_access_lib.dart' deferred as prefix;
 
 expect(expected, actual) {}

pkg/front_end/testcases/extensions/deferred_explicit_access.dart.weak.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -17,7 +17,7 @@ static method main() → dynamic async /* futureValueType= dynamic */ {
   await LoadLibrary(prefix);
   self::expect(0, let final dynamic #t1 = CheckLibraryIsLoaded(prefix) in def::Extension|staticField);
   self::expect(0, let final dynamic #t2 = CheckLibraryIsLoaded(prefix) in def::Extension|get#property(0));
-  self::expect(42, let final dynamic #t3 = CheckLibraryIsLoaded(prefix) in let final core::int* #t4 = 0 in let final core::int* #t5 = 42 in let final void #t6 = def::Extension|set#property(#t4, #t5) in #t5);
+  self::expect(42, let final dynamic #t3 = CheckLibraryIsLoaded(prefix) in let final core::int #t4 = 0 in let final core::int #t5 = 42 in let final void #t6 = def::Extension|set#property(#t4, #t5) in #t5);
   self::expect(84, let final dynamic #t7 = CheckLibraryIsLoaded(prefix) in def::Extension|get#property(42));
   self::expect(85, let final dynamic #t8 = CheckLibraryIsLoaded(prefix) in def::Extension|method(43));
   self::expect(42, let final dynamic #t9 = CheckLibraryIsLoaded(prefix) in def::Extension|staticProperty);
@@ -25,15 +25,15 @@ static method main() → dynamic async /* futureValueType= dynamic */ {
   self::expect(87, let final dynamic #t11 = CheckLibraryIsLoaded(prefix) in def::Extension|staticMethod());
 }
 static method expect(dynamic expected, dynamic actual) → dynamic {
-  if(!(expected =={core::Object::==}{(core::Object*) →* core::bool*} actual))
+  if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual))
     throw "Expected ${expected}, actual ${actual}";
 }
 
-library;
+library /*isNonNullableByDefault*/;
 import self as def;
 import "dart:core" as core;
 
-extension Extension on core::int* {
+extension Extension on core::int {
   static field staticField = def::Extension|staticField;
   static get staticProperty = get def::Extension|staticProperty;
   static method staticMethod = def::Extension|staticMethod;
@@ -43,27 +43,27 @@ extension Extension on core::int* {
   static set staticProperty = set def::Extension|staticProperty;
   set property = def::Extension|set#property;
 }
-static field core::int* Extension|staticField = 0;
-static field core::int* topLevelField = def::Extension|staticField;
-static get Extension|staticProperty() → core::int*
+static field core::int Extension|staticField = 0;
+static field core::int topLevelField = def::Extension|staticField;
+static get Extension|staticProperty() → core::int
   return def::Extension|staticField;
-static set Extension|staticProperty(core::int* value) → void {
+static set Extension|staticProperty(core::int value) → void {
   def::Extension|staticField = value;
 }
-static method Extension|staticMethod() → core::int*
+static method Extension|staticMethod() → core::int
   return def::Extension|staticField;
-static method Extension|get#property(lowered final core::int* #this) → core::int*
-  return #this.{core::num::+}(def::Extension|staticField){(core::num*) →* core::int*};
-static method Extension|set#property(lowered final core::int* #this, core::int* value) → void {
+static method Extension|get#property(lowered final core::int #this) → core::int
+  return #this.{core::num::+}(def::Extension|staticField){(core::num) → core::int};
+static method Extension|set#property(lowered final core::int #this, core::int value) → void {
   def::Extension|staticField = value;
 }
-static method Extension|method(lowered final core::int* #this) → core::int*
-  return #this.{core::num::+}(def::Extension|staticField){(core::num*) →* core::int*};
-static method Extension|get#method(lowered final core::int* #this) → () →* core::int*
-  return () → core::int* => def::Extension|method(#this);
-static get topLevelProperty() → core::int*
+static method Extension|method(lowered final core::int #this) → core::int
+  return #this.{core::num::+}(def::Extension|staticField){(core::num) → core::int};
+static method Extension|get#method(lowered final core::int #this) → () → core::int
+  return () → core::int => def::Extension|method(#this);
+static get topLevelProperty() → core::int
   return def::Extension|staticField;
-static set topLevelProperty(core::int* value) → void {
+static set topLevelProperty(core::int value) → void {
   def::Extension|staticField = value;
 }
 static method topLevelMethod() → dynamic

pkg/front_end/testcases/extensions/deferred_explicit_access.dart.weak.modular.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -17,7 +17,7 @@ static method main() → dynamic async /* futureValueType= dynamic */ {
   await LoadLibrary(prefix);
   self::expect(0, let final dynamic #t1 = CheckLibraryIsLoaded(prefix) in def::Extension|staticField);
   self::expect(0, let final dynamic #t2 = CheckLibraryIsLoaded(prefix) in def::Extension|get#property(0));
-  self::expect(42, let final dynamic #t3 = CheckLibraryIsLoaded(prefix) in let final core::int* #t4 = 0 in let final core::int* #t5 = 42 in let final void #t6 = def::Extension|set#property(#t4, #t5) in #t5);
+  self::expect(42, let final dynamic #t3 = CheckLibraryIsLoaded(prefix) in let final core::int #t4 = 0 in let final core::int #t5 = 42 in let final void #t6 = def::Extension|set#property(#t4, #t5) in #t5);
   self::expect(84, let final dynamic #t7 = CheckLibraryIsLoaded(prefix) in def::Extension|get#property(42));
   self::expect(85, let final dynamic #t8 = CheckLibraryIsLoaded(prefix) in def::Extension|method(43));
   self::expect(42, let final dynamic #t9 = CheckLibraryIsLoaded(prefix) in def::Extension|staticProperty);
@@ -25,15 +25,15 @@ static method main() → dynamic async /* futureValueType= dynamic */ {
   self::expect(87, let final dynamic #t11 = CheckLibraryIsLoaded(prefix) in def::Extension|staticMethod());
 }
 static method expect(dynamic expected, dynamic actual) → dynamic {
-  if(!(expected =={core::Object::==}{(core::Object*) →* core::bool*} actual))
+  if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual))
     throw "Expected ${expected}, actual ${actual}";
 }
 
-library;
+library /*isNonNullableByDefault*/;
 import self as def;
 import "dart:core" as core;
 
-extension Extension on core::int* {
+extension Extension on core::int {
   static field staticField = def::Extension|staticField;
   static get staticProperty = get def::Extension|staticProperty;
   static method staticMethod = def::Extension|staticMethod;
@@ -43,27 +43,27 @@ extension Extension on core::int* {
   static set staticProperty = set def::Extension|staticProperty;
   set property = def::Extension|set#property;
 }
-static field core::int* Extension|staticField = 0;
-static field core::int* topLevelField = def::Extension|staticField;
-static get Extension|staticProperty() → core::int*
+static field core::int Extension|staticField = 0;
+static field core::int topLevelField = def::Extension|staticField;
+static get Extension|staticProperty() → core::int
   return def::Extension|staticField;
-static set Extension|staticProperty(core::int* value) → void {
+static set Extension|staticProperty(core::int value) → void {
   def::Extension|staticField = value;
 }
-static method Extension|staticMethod() → core::int*
+static method Extension|staticMethod() → core::int
   return def::Extension|staticField;
-static method Extension|get#property(lowered final core::int* #this) → core::int*
-  return #this.{core::num::+}(def::Extension|staticField){(core::num*) →* core::int*};
-static method Extension|set#property(lowered final core::int* #this, core::int* value) → void {
+static method Extension|get#property(lowered final core::int #this) → core::int
+  return #this.{core::num::+}(def::Extension|staticField){(core::num) → core::int};
+static method Extension|set#property(lowered final core::int #this, core::int value) → void {
   def::Extension|staticField = value;
 }
-static method Extension|method(lowered final core::int* #this) → core::int*
-  return #this.{core::num::+}(def::Extension|staticField){(core::num*) →* core::int*};
-static method Extension|get#method(lowered final core::int* #this) → () →* core::int*
-  return () → core::int* => def::Extension|method(#this);
-static get topLevelProperty() → core::int*
+static method Extension|method(lowered final core::int #this) → core::int
+  return #this.{core::num::+}(def::Extension|staticField){(core::num) → core::int};
+static method Extension|get#method(lowered final core::int #this) → () → core::int
+  return () → core::int => def::Extension|method(#this);
+static get topLevelProperty() → core::int
   return def::Extension|staticField;
-static set topLevelProperty(core::int* value) → void {
+static set topLevelProperty(core::int value) → void {
   def::Extension|staticField = value;
 }
 static method topLevelMethod() → dynamic

pkg/front_end/testcases/extensions/deferred_explicit_access.dart.weak.outline.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -16,11 +16,11 @@ static method main() → dynamic async
 static method expect(dynamic expected, dynamic actual) → dynamic
   ;
 
-library;
+library /*isNonNullableByDefault*/;
 import self as self2;
 import "dart:core" as core;
 
-extension Extension on core::int* {
+extension Extension on core::int {
   static field staticField = self2::Extension|staticField;
   static get staticProperty = get self2::Extension|staticProperty;
   static method staticMethod = self2::Extension|staticMethod;
@@ -30,25 +30,25 @@ extension Extension on core::int* {
   static set staticProperty = set self2::Extension|staticProperty;
   set property = self2::Extension|set#property;
 }
-static field core::int* Extension|staticField;
-static field core::int* topLevelField;
-static get Extension|staticProperty() → core::int*
+static field core::int Extension|staticField;
+static field core::int topLevelField;
+static get Extension|staticProperty() → core::int
   ;
-static set Extension|staticProperty(core::int* value) → void
+static set Extension|staticProperty(core::int value) → void
   ;
-static method Extension|staticMethod() → core::int*
+static method Extension|staticMethod() → core::int
   ;
-static method Extension|get#property(lowered final core::int* #this) → core::int*
+static method Extension|get#property(lowered final core::int #this) → core::int
   ;
-static method Extension|set#property(lowered final core::int* #this, core::int* value) → void
+static method Extension|set#property(lowered final core::int #this, core::int value) → void
   ;
-static method Extension|method(lowered final core::int* #this) → core::int*
+static method Extension|method(lowered final core::int #this) → core::int
   ;
-static method Extension|get#method(lowered final core::int* #this) → () →* core::int*
-  return () → core::int* => self2::Extension|method(#this);
-static get topLevelProperty() → core::int*
+static method Extension|get#method(lowered final core::int #this) → () → core::int
+  return () → core::int => self2::Extension|method(#this);
+static get topLevelProperty() → core::int
   ;
-static set topLevelProperty(core::int* value) → void
+static set topLevelProperty(core::int value) → void
   ;
 static method topLevelMethod() → dynamic
   ;

pkg/front_end/testcases/extensions/deferred_explicit_access.dart.weak.transformed.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
@@ -15,12 +15,12 @@ import "deferred_explicit_access_lib.dart" as def;
 import "org-dartlang-testcase:///deferred_explicit_access_lib.dart" deferred as prefix;
 
 static method main() → dynamic /* futureValueType= dynamic */ /* originally async */ {
-  final asy::_Future<dynamic>* :async_future = new asy::_Future::•<dynamic>();
+  final asy::_Future<dynamic> :async_future = new asy::_Future::•<dynamic>();
   core::bool* :is_sync = false;
   dynamic :return_value;
-  (dynamic) →* dynamic :async_op_then;
-  (core::Object*, core::StackTrace*) →* dynamic :async_op_error;
-  core::int* :await_jump_var = 0;
+  (dynamic) → dynamic :async_op_then;
+  (core::Object, core::StackTrace) → dynamic :async_op_error;
+  core::int :await_jump_var = 0;
   dynamic :await_ctx_var;
   dynamic :saved_try_context_var0;
   function :async_op(dynamic :result_or_exception, dynamic :stack_trace) → dynamic yielding 
@@ -31,7 +31,7 @@ static method main() → dynamic /* futureValueType= dynamic */ /* originally as
         :result_or_exception;
         self::expect(0, let final core::Object* #t2 = CheckLibraryIsLoaded(prefix) in def::Extension|staticField);
         self::expect(0, let final core::Object* #t3 = CheckLibraryIsLoaded(prefix) in def::Extension|get#property(0));
-        self::expect(42, let final core::Object* #t4 = CheckLibraryIsLoaded(prefix) in let final core::int* #t5 = 0 in let final core::int* #t6 = 42 in let final void #t7 = def::Extension|set#property(#t5, #t6) in #t6);
+        self::expect(42, let final core::Object* #t4 = CheckLibraryIsLoaded(prefix) in let final core::int #t5 = 0 in let final core::int #t6 = 42 in let final void #t7 = def::Extension|set#property(#t5, #t6) in #t6);
         self::expect(84, let final core::Object* #t8 = CheckLibraryIsLoaded(prefix) in def::Extension|get#property(42));
         self::expect(85, let final core::Object* #t9 = CheckLibraryIsLoaded(prefix) in def::Extension|method(43));
         self::expect(42, let final core::Object* #t10 = CheckLibraryIsLoaded(prefix) in def::Extension|staticProperty);
@@ -41,25 +41,25 @@ static method main() → dynamic /* futureValueType= dynamic */ /* originally as
       asy::_completeWithNoFutureOnAsyncReturn(:async_future, :return_value, :is_sync);
       return;
     }
-    on dynamic catch(dynamic exception, core::StackTrace* stack_trace) {
+    on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
       asy::_completeOnAsyncError(:async_future, exception, stack_trace, :is_sync);
     }
   :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
   :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
-  :async_op(null, null){() →* dynamic};
+  :async_op(null, null){() → dynamic};
   :is_sync = true;
   return :async_future;
 }
 static method expect(dynamic expected, dynamic actual) → dynamic {
-  if(!(expected =={core::Object::==}{(core::Object*) →* core::bool*} actual))
+  if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual))
     throw "Expected ${expected}, actual ${actual}";
 }
 
-library;
+library /*isNonNullableByDefault*/;
 import self as def;
 import "dart:core" as core;
 
-extension Extension on core::int* {
+extension Extension on core::int {
   static field staticField = def::Extension|staticField;
   static get staticProperty = get def::Extension|staticProperty;
   static method staticMethod = def::Extension|staticMethod;
@@ -69,27 +69,27 @@ extension Extension on core::int* {
   static set staticProperty = set def::Extension|staticProperty;
   set property = def::Extension|set#property;
 }
-static field core::int* Extension|staticField = 0;
-static field core::int* topLevelField = def::Extension|staticField;
-static get Extension|staticProperty() → core::int*
+static field core::int Extension|staticField = 0;
+static field core::int topLevelField = def::Extension|staticField;
+static get Extension|staticProperty() → core::int
   return def::Extension|staticField;
-static set Extension|staticProperty(core::int* value) → void {
+static set Extension|staticProperty(core::int value) → void {
   def::Extension|staticField = value;
 }
-static method Extension|staticMethod() → core::int*
+static method Extension|staticMethod() → core::int
   return def::Extension|staticField;
-static method Extension|get#property(lowered final core::int* #this) → core::int*
-  return #this.{core::num::+}(def::Extension|staticField){(core::num*) →* core::int*};
-static method Extension|set#property(lowered final core::int* #this, core::int* value) → void {
+static method Extension|get#property(lowered final core::int #this) → core::int
+  return #this.{core::num::+}(def::Extension|staticField){(core::num) → core::int};
+static method Extension|set#property(lowered final core::int #this, core::int value) → void {
   def::Extension|staticField = value;
 }
-static method Extension|method(lowered final core::int* #this) → core::int*
-  return #this.{core::num::+}(def::Extension|staticField){(core::num*) →* core::int*};
-static method Extension|get#method(lowered final core::int* #this) → () →* core::int*
-  return () → core::int* => def::Extension|method(#this);
-static get topLevelProperty() → core::int*
+static method Extension|method(lowered final core::int #this) → core::int
+  return #this.{core::num::+}(def::Extension|staticField){(core::num) → core::int};
+static method Extension|get#method(lowered final core::int #this) → () → core::int
+  return () → core::int => def::Extension|method(#this);
+static get topLevelProperty() → core::int
   return def::Extension|staticField;
-static set topLevelProperty(core::int* value) → void {
+static set topLevelProperty(core::int value) → void {
   def::Extension|staticField = value;
 }
 static method topLevelMethod() → dynamic

pkg/front_end/testcases/extensions/deferred_explicit_access_lib.dart

@@ -1,7 +1,7 @@
 // Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// @dart=2.9
+
 extension Extension on int {
   static int staticField = 0;
 

pkg/front_end/testcases/extensions/deferred_import_hidden.dart

@@ -1,7 +1,7 @@
 // Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// @dart=2.9
+
 import 'deferred_explicit_access_lib.dart' deferred as prefix hide Extension;
 
 main() async {

pkg/front_end/testcases/extensions/deferred_import_hidden.dart.textual_outline.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 import 'deferred_explicit_access_lib.dart' deferred as prefix hide Extension;
 
 main() async {}

pkg/front_end/testcases/extensions/deferred_import_hidden.dart.textual_outline_modelled.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 import 'deferred_explicit_access_lib.dart' deferred as prefix hide Extension;
 
 expect(expected, actual) {}

pkg/front_end/testcases/extensions/deferred_import_hidden.dart.weak.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "deferred_explicit_access_lib.dart" as def;
 import "dart:core" as core;
@@ -16,15 +16,15 @@ static method main() → dynamic async /* futureValueType= dynamic */ {
   self::expect(87, let final dynamic #t7 = CheckLibraryIsLoaded(prefix) in def::topLevelMethod());
 }
 static method expect(dynamic expected, dynamic actual) → dynamic {
-  if(!(expected =={core::Object::==}{(core::Object*) →* core::bool*} actual))
+  if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual))
     throw "Expected ${expected}, actual ${actual}";
 }
 
-library;
+library /*isNonNullableByDefault*/;
 import self as def;
 import "dart:core" as core;
 
-extension Extension on core::int* {
+extension Extension on core::int {
   static field staticField = def::Extension|staticField;
   static get staticProperty = get def::Extension|staticProperty;
   static method staticMethod = def::Extension|staticMethod;
@@ -34,27 +34,27 @@ extension Extension on core::int* {
   static set staticProperty = set def::Extension|staticProperty;
   set property = def::Extension|set#property;
 }
-static field core::int* Extension|staticField = 0;
-static field core::int* topLevelField = def::Extension|staticField;
-static get Extension|staticProperty() → core::int*
+static field core::int Extension|staticField = 0;
+static field core::int topLevelField = def::Extension|staticField;
+static get Extension|staticProperty() → core::int
   return def::Extension|staticField;
-static set Extension|staticProperty(core::int* value) → void {
+static set Extension|staticProperty(core::int value) → void {
   def::Extension|staticField = value;
 }
-static method Extension|staticMethod() → core::int*
+static method Extension|staticMethod() → core::int
   return def::Extension|staticField;
-static method Extension|get#property(lowered final core::int* #this) → core::int*
-  return #this.{core::num::+}(def::Extension|staticField){(core::num*) →* core::int*};
-static method Extension|set#property(lowered final core::int* #this, core::int* value) → void {
+static method Extension|get#property(lowered final core::int #this) → core::int
+  return #this.{core::num::+}(def::Extension|staticField){(core::num) → core::int};
+static method Extension|set#property(lowered final core::int #this, core::int value) → void {
   def::Extension|staticField = value;
 }
-static method Extension|method(lowered final core::int* #this) → core::int*
-  return #this.{core::num::+}(def::Extension|staticField){(core::num*) →* core::int*};
-static method Extension|get#method(lowered final core::int* #this) → () →* core::int*
-  return () → core::int* => def::Extension|method(#this);
-static get topLevelProperty() → core::int*
+static method Extension|method(lowered final core::int #this) → core::int
+  return #this.{core::num::+}(def::Extension|staticField){(core::num) → core::int};
+static method Extension|get#method(lowered final core::int #this) → () → core::int
+  return () → core::int => def::Extension|method(#this);
+static get topLevelProperty() → core::int
   return def::Extension|staticField;
-static set topLevelProperty(core::int* value) → void {
+static set topLevelProperty(core::int value) → void {
   def::Extension|staticField = value;
 }
 static method topLevelMethod() → dynamic

pkg/front_end/testcases/extensions/deferred_import_hidden.dart.weak.modular.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "deferred_explicit_access_lib.dart" as def;
 import "dart:core" as core;
@@ -16,15 +16,15 @@ static method main() → dynamic async /* futureValueType= dynamic */ {
   self::expect(87, let final dynamic #t7 = CheckLibraryIsLoaded(prefix) in def::topLevelMethod());
 }
 static method expect(dynamic expected, dynamic actual) → dynamic {
-  if(!(expected =={core::Object::==}{(core::Object*) →* core::bool*} actual))
+  if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual))
     throw "Expected ${expected}, actual ${actual}";
 }
 
-library;
+library /*isNonNullableByDefault*/;
 import self as def;
 import "dart:core" as core;
 
-extension Extension on core::int* {
+extension Extension on core::int {
   static field staticField = def::Extension|staticField;
   static get staticProperty = get def::Extension|staticProperty;
   static method staticMethod = def::Extension|staticMethod;
@@ -34,27 +34,27 @@ extension Extension on core::int* {
   static set staticProperty = set def::Extension|staticProperty;
   set property = def::Extension|set#property;
 }
-static field core::int* Extension|staticField = 0;
-static field core::int* topLevelField = def::Extension|staticField;
-static get Extension|staticProperty() → core::int*
+static field core::int Extension|staticField = 0;
+static field core::int topLevelField = def::Extension|staticField;
+static get Extension|staticProperty() → core::int
   return def::Extension|staticField;
-static set Extension|staticProperty(core::int* value) → void {
+static set Extension|staticProperty(core::int value) → void {
   def::Extension|staticField = value;
 }
-static method Extension|staticMethod() → core::int*
+static method Extension|staticMethod() → core::int
   return def::Extension|staticField;
-static method Extension|get#property(lowered final core::int* #this) → core::int*
-  return #this.{core::num::+}(def::Extension|staticField){(core::num*) →* core::int*};
-static method Extension|set#property(lowered final core::int* #this, core::int* value) → void {
+static method Extension|get#property(lowered final core::int #this) → core::int
+  return #this.{core::num::+}(def::Extension|staticField){(core::num) → core::int};
+static method Extension|set#property(lowered final core::int #this, core::int value) → void {
   def::Extension|staticField = value;
 }
-static method Extension|method(lowered final core::int* #this) → core::int*
-  return #this.{core::num::+}(def::Extension|staticField){(core::num*) →* core::int*};
-static method Extension|get#method(lowered final core::int* #this) → () →* core::int*
-  return () → core::int* => def::Extension|method(#this);
-static get topLevelProperty() → core::int*
+static method Extension|method(lowered final core::int #this) → core::int
+  return #this.{core::num::+}(def::Extension|staticField){(core::num) → core::int};
+static method Extension|get#method(lowered final core::int #this) → () → core::int
+  return () → core::int => def::Extension|method(#this);
+static get topLevelProperty() → core::int
   return def::Extension|staticField;
-static set topLevelProperty(core::int* value) → void {
+static set topLevelProperty(core::int value) → void {
   def::Extension|staticField = value;
 }
 static method topLevelMethod() → dynamic

pkg/front_end/testcases/extensions/deferred_import_hidden.dart.weak.outline.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 
 import "org-dartlang-testcase:///deferred_explicit_access_lib.dart" deferred as prefix hide Extension;
@@ -8,11 +8,11 @@ static method main() → dynamic async
 static method expect(dynamic expected, dynamic actual) → dynamic
   ;
 
-library;
+library /*isNonNullableByDefault*/;
 import self as self2;
 import "dart:core" as core;
 
-extension Extension on core::int* {
+extension Extension on core::int {
   static field staticField = self2::Extension|staticField;
   static get staticProperty = get self2::Extension|staticProperty;
   static method staticMethod = self2::Extension|staticMethod;
@@ -22,25 +22,25 @@ extension Extension on core::int* {
   static set staticProperty = set self2::Extension|staticProperty;
   set property = self2::Extension|set#property;
 }
-static field core::int* Extension|staticField;
-static field core::int* topLevelField;
-static get Extension|staticProperty() → core::int*
+static field core::int Extension|staticField;
+static field core::int topLevelField;
+static get Extension|staticProperty() → core::int
   ;
-static set Extension|staticProperty(core::int* value) → void
+static set Extension|staticProperty(core::int value) → void
   ;
-static method Extension|staticMethod() → core::int*
+static method Extension|staticMethod() → core::int
   ;
-static method Extension|get#property(lowered final core::int* #this) → core::int*
+static method Extension|get#property(lowered final core::int #this) → core::int
   ;
-static method Extension|set#property(lowered final core::int* #this, core::int* value) → void
+static method Extension|set#property(lowered final core::int #this, core::int value) → void
   ;
-static method Extension|method(lowered final core::int* #this) → core::int*
+static method Extension|method(lowered final core::int #this) → core::int
   ;
-static method Extension|get#method(lowered final core::int* #this) → () →* core::int*
-  return () → core::int* => self2::Extension|method(#this);
-static get topLevelProperty() → core::int*
+static method Extension|get#method(lowered final core::int #this) → () → core::int
+  return () → core::int => self2::Extension|method(#this);
+static get topLevelProperty() → core::int
   ;
-static set topLevelProperty(core::int* value) → void
+static set topLevelProperty(core::int value) → void
   ;
 static method topLevelMethod() → dynamic
   ;

pkg/front_end/testcases/extensions/deferred_import_hidden.dart.weak.transformed.expect

@@ -1,4 +1,4 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:async" as asy;
 import "dart:core" as core;
@@ -7,12 +7,12 @@ import "deferred_explicit_access_lib.dart" as def;
 import "org-dartlang-testcase:///deferred_explicit_access_lib.dart" deferred as prefix hide Extension;
 
 static method main() → dynamic /* futureValueType= dynamic */ /* originally async */ {
-  final asy::_Future<dynamic>* :async_future = new asy::_Future::•<dynamic>();
+  final asy::_Future<dynamic> :async_future = new asy::_Future::•<dynamic>();
   core::bool* :is_sync = false;
   dynamic :return_value;
-  (dynamic) →* dynamic :async_op_then;
-  (core::Object*, core::StackTrace*) →* dynamic :async_op_error;
-  core::int* :await_jump_var = 0;
+  (dynamic) → dynamic :async_op_then;
+  (core::Object, core::StackTrace) → dynamic :async_op_error;
+  core::int :await_jump_var = 0;
   dynamic :await_ctx_var;
   dynamic :saved_try_context_var0;
   function :async_op(dynamic :result_or_exception, dynamic :stack_trace) → dynamic yielding 
@@ -32,25 +32,25 @@ static method main() → dynamic /* futureValueType= dynamic */ /* originally as
       asy::_completeWithNoFutureOnAsyncReturn(:async_future, :return_value, :is_sync);
       return;
     }
-    on dynamic catch(dynamic exception, core::StackTrace* stack_trace) {
+    on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
       asy::_completeOnAsyncError(:async_future, exception, stack_trace, :is_sync);
     }
   :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
   :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
-  :async_op(null, null){() →* dynamic};
+  :async_op(null, null){() → dynamic};
   :is_sync = true;
   return :async_future;
 }
 static method expect(dynamic expected, dynamic actual) → dynamic {
-  if(!(expected =={core::Object::==}{(core::Object*) →* core::bool*} actual))
+  if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual))
     throw "Expected ${expected}, actual ${actual}";
 }
 
-library;
+library /*isNonNullableByDefault*/;
 import self as def;
 import "dart:core" as core;
 
-extension Extension on core::int* {
+extension Extension on core::int {
   static field staticField = def::Extension|staticField;
   static get staticProperty = get def::Extension|staticProperty;
   static method staticMethod = def::Extension|staticMethod;
@@ -60,27 +60,27 @@ extension Extension on core::int* {
   static set staticProperty = set def::Extension|staticProperty;
   set property = def::Extension|set#property;
 }
-static field core::int* Extension|staticField = 0;
-static field core::int* topLevelField = def::Extension|staticField;
-static get Extension|staticProperty() → core::int*
+static field core::int Extension|staticField = 0;
+static field core::int topLevelField = def::Extension|staticField;
+static get Extension|staticProperty() → core::int
   return def::Extension|staticField;
-static set Extension|staticProperty(core::int* value) → void {
+static set Extension|staticProperty(core::int value) → void {
   def::Extension|staticField = value;
 }
-static method Extension|staticMethod() → core::int*
+static method Extension|staticMethod() → core::int
   return def::Extension|staticField;
-static method Extension|get#property(lowered final core::int* #this) → core::int*
-  return #this.{core::num::+}(def::Extension|staticField){(core::num*) →* core::int*};
-static method Extension|set#property(lowered final core::int* #this, core::int* value) → void {
+static method Extension|get#property(lowered final core::int #this) → core::int
+  return #this.{core::num::+}(def::Extension|staticField){(core::num) → core::int};
+static method Extension|set#property(lowered final core::int #this, core::int value) → void {
   def::Extension|staticField = value;
 }
-static method Extension|method(lowered final core::int* #this) → core::int*
-  return #this.{core::num::+}(def::Extension|staticField){(core::num*) →* core::int*};
-static method Extension|get#method(lowered final core::int* #this) → () →* core::int*
-  return () → core::int* => def::Extension|method(#this);
-static get topLevelProperty() → core::int*
+static method Extension|method(lowered final core::int #this) → core::int
+  return #this.{core::num::+}(def::Extension|staticField){(core::num) → core::int};
+static method Extension|get#method(lowered final core::int #this) → () → core::int
+  return () → core::int => def::Extension|method(#this);
+static get topLevelProperty() → core::int
   return def::Extension|staticField;
-static set topLevelProperty(core::int* value) → void {
+static set topLevelProperty(core::int value) → void {
   def::Extension|staticField = value;
 }
 static method topLevelMethod() → dynamic

pkg/front_end/testcases/extensions/direct_instance_access.dart

@@ -1,7 +1,7 @@
 // Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// @dart=2.9
+
 class Class {
   var field;
 }
@@ -67,11 +67,11 @@ extension Extension on Class {
 }
 
 class GenericClass<T> {
-  T field;
+  T? field;
 }
 
 extension GenericExtension<T> on GenericClass<T> {
-  T readGetter() {
+  T? readGetter() {
     return property;
   }
 
@@ -79,11 +79,11 @@ extension GenericExtension<T> on GenericClass<T> {
     property = value;
   }
 
-  writeSetterOptional([T value]) {
+  writeSetterOptional([T? value]) {
    property = value;
   }
 
-  writeSetterNamed({T value}) {
+  writeSetterNamed({T? value}) {
     property = value;
   }
 
@@ -91,17 +91,17 @@ extension GenericExtension<T> on GenericClass<T> {
    property = value;
   }
 
-  genericWriteSetterOptional<S extends T>([S value]) {
+  genericWriteSetterOptional<S extends T>([S? value]) {
     property = value;
   }
 
-  genericWriteSetterNamed<S extends T>({S value}) {
+  genericWriteSetterNamed<S extends T>({S? value}) {
    property = value;
   }
 
-  T get property => this.field;
+  T? get property => this.field;
 
-  void set property(T value) {
+  void set property(T? value) {
     this.field = value;
   }
 

pkg/front_end/testcases/extensions/direct_instance_access.dart.textual_outline.expect

@@ -1,4 +1,3 @@
-// @dart = 2.9
 class Class {
   var field;
 }
@@ -20,19 +19,19 @@ extension Extension on Class {
 }
 
 class GenericClass<T> {
-  T field;
+  T? field;
 }
 
 extension GenericExtension<T> on GenericClass<T> {
-  T readGetter() {}
+  T? readGetter() {}
   writeSetterRequired(T value) {}
-  writeSetterOptional([T value]) {}
-  writeSetterNamed({T value}) {}
+  writeSetterOptional([T? value]) {}
+  writeSetterNamed({T? value}) {}
   genericWriteSetterRequired<S extends T>(S value) {}
-  genericWriteSetterOptional<S extends T>([S value]) {}
-  genericWriteSetterNamed<S extends T>({S value}) {}
-  T get property => this.field;
-  void set property(T value) {}
+  genericWriteSetterOptional<S extends T>([S? value]) {}
+  genericWriteSetterNamed<S extends T>({S? value}) {}
+  T? get property => this.field;
+  void set property(T? value) {}
   get tearOffGetterNoArgs => readGetter;
   get tearOffGetterRequired => writeSetterRequired;
   get tearOffGetterOptional => writeSetterOptional;

pkg/front_end/testcases/extensions/direct_instance_access.dart.textual_outline_modelled.expect

@@ -1,10 +1,9 @@
-// @dart = 2.9
 class Class {
   var field;
 }
 
 class GenericClass<T> {
-  T field;
+  T? field;
 }
 
 extension Extension on Class {
@@ -24,10 +23,10 @@ extension Extension on Class {
 }
 
 extension GenericExtension<T> on GenericClass<T> {
-  T get property => this.field;
-  T readGetter() {}
-  genericWriteSetterNamed<S extends T>({S value}) {}
-  genericWriteSetterOptional<S extends T>([S value]) {}
+  T? get property => this.field;
+  T? readGetter() {}
+  genericWriteSetterNamed<S extends T>({S? value}) {}
+  genericWriteSetterOptional<S extends T>([S? value]) {}
   genericWriteSetterRequired<S extends T>(S value) {}
   get tearOffGetterGenericNamed => genericWriteSetterNamed;
   get tearOffGetterGenericOptional => genericWriteSetterOptional;
@@ -39,9 +38,9 @@ extension GenericExtension<T> on GenericClass<T> {
   getterCalls<S extends T>(S value) {}
   invocations<S extends T>(S value) {}
   tearOffs<S extends T>(S value) {}
-  void set property(T value) {}
-  writeSetterNamed({T value}) {}
-  writeSetterOptional([T value]) {}
+  void set property(T? value) {}
+  writeSetterNamed({T? value}) {}
+  writeSetterOptional([T? value]) {}
   writeSetterRequired(T value) {}
 }
 

pkg/front_end/testcases/extensions/direct_instance_access.dart.weak.expect

@@ -1,40 +1,20 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 class Class extends core::Object {
   field dynamic field = null;
-  synthetic constructor •() → self::Class*
+  synthetic constructor •() → self::Class
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-class GenericClass<T extends core::Object* = dynamic> extends core::Object {
-  covariant-by-class field self::GenericClass::T* field = null;
-  synthetic constructor •() → self::GenericClass<self::GenericClass::T*>*
+class GenericClass<T extends core::Object? = dynamic> extends core::Object {
+  covariant-by-class field self::GenericClass::T? field = null;
+  synthetic constructor •() → self::GenericClass<self::GenericClass::T%>
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension Extension on self::Class* {
+extension Extension on self::Class {
   method readGetter = self::Extension|readGetter;
   tearoff readGetter = self::Extension|get#readGetter;
   method writeSetterRequired = self::Extension|writeSetterRequired;
@@ -56,7 +36,7 @@ extension Extension on self::Class* {
   tearoff getterCalls = self::Extension|get#getterCalls;
   set property = self::Extension|set#property;
 }
-extension GenericExtension<T extends core::Object* = dynamic> on self::GenericClass<T*>* {
+extension GenericExtension<T extends core::Object? = dynamic> on self::GenericClass<T%> {
   method readGetter = self::GenericExtension|readGetter;
   tearoff readGetter = self::GenericExtension|get#readGetter;
   method writeSetterRequired = self::GenericExtension|writeSetterRequired;
@@ -87,40 +67,40 @@ extension GenericExtension<T extends core::Object* = dynamic> on self::GenericCl
   tearoff getterCalls = self::GenericExtension|get#getterCalls;
   set property = self::GenericExtension|set#property;
 }
-static method Extension|get#readGetter(lowered final self::Class* #this) → () →* dynamic
+static method Extension|get#readGetter(lowered final self::Class #this) → () → dynamic
   return () → dynamic => self::Extension|readGetter(#this);
-static method Extension|readGetter(lowered final self::Class* #this) → dynamic {
+static method Extension|readGetter(lowered final self::Class #this) → dynamic {
   return self::Extension|get#property(#this);
 }
-static method Extension|writeSetterRequired(lowered final self::Class* #this, dynamic value) → dynamic {
+static method Extension|writeSetterRequired(lowered final self::Class #this, dynamic value) → dynamic {
   self::Extension|set#property(#this, value);
 }
-static method Extension|get#writeSetterRequired(lowered final self::Class* #this) → (dynamic) →* dynamic
+static method Extension|get#writeSetterRequired(lowered final self::Class #this) → (dynamic) → dynamic
   return (dynamic value) → dynamic => self::Extension|writeSetterRequired(#this, value);
-static method Extension|writeSetterOptional(lowered final self::Class* #this, [dynamic value = #C1]) → dynamic {
+static method Extension|writeSetterOptional(lowered final self::Class #this, [dynamic value = #C1]) → dynamic {
   self::Extension|set#property(#this, value);
 }
-static method Extension|get#writeSetterOptional(lowered final self::Class* #this) → ([dynamic]) →* dynamic
+static method Extension|get#writeSetterOptional(lowered final self::Class #this) → ([dynamic]) → dynamic
   return ([dynamic value = #C1]) → dynamic => self::Extension|writeSetterOptional(#this, value);
-static method Extension|writeSetterNamed(lowered final self::Class* #this, {dynamic value = #C1}) → dynamic {
+static method Extension|writeSetterNamed(lowered final self::Class #this, {dynamic value = #C1}) → dynamic {
   self::Extension|set#property(#this, value);
 }
-static method Extension|get#writeSetterNamed(lowered final self::Class* #this) → ({value: dynamic}) →* dynamic
+static method Extension|get#writeSetterNamed(lowered final self::Class #this) → ({value: dynamic}) → dynamic
   return ({dynamic value = #C1}) → dynamic => self::Extension|writeSetterNamed(#this, value: value);
-static method Extension|get#tearOffGetterNoArgs(lowered final self::Class* #this) → dynamic
+static method Extension|get#tearOffGetterNoArgs(lowered final self::Class #this) → dynamic
   return self::Extension|get#readGetter(#this);
-static method Extension|get#tearOffGetterRequired(lowered final self::Class* #this) → dynamic
+static method Extension|get#tearOffGetterRequired(lowered final self::Class #this) → dynamic
   return self::Extension|get#writeSetterRequired(#this);
-static method Extension|get#tearOffGetterOptional(lowered final self::Class* #this) → dynamic
+static method Extension|get#tearOffGetterOptional(lowered final self::Class #this) → dynamic
   return self::Extension|get#writeSetterOptional(#this);
-static method Extension|get#tearOffGetterNamed(lowered final self::Class* #this) → dynamic
+static method Extension|get#tearOffGetterNamed(lowered final self::Class #this) → dynamic
   return self::Extension|get#writeSetterNamed(#this);
-static method Extension|get#property(lowered final self::Class* #this) → dynamic
+static method Extension|get#property(lowered final self::Class #this) → dynamic
   return #this.{self::Class::field}{dynamic};
-static method Extension|set#property(lowered final self::Class* #this, dynamic value) → void {
+static method Extension|set#property(lowered final self::Class #this, dynamic value) → void {
   #this.{self::Class::field} = value;
 }
-static method Extension|invocations(lowered final self::Class* #this, dynamic value) → dynamic {
+static method Extension|invocations(lowered final self::Class #this, dynamic value) → dynamic {
   self::Extension|readGetter(#this);
   self::Extension|writeSetterRequired(#this, value);
   self::Extension|writeSetterOptional(#this);
@@ -128,23 +108,23 @@ static method Extension|invocations(lowered final self::Class* #this, dynamic va
   self::Extension|writeSetterNamed(#this);
   self::Extension|writeSetterNamed(#this, value: value);
 }
-static method Extension|get#invocations(lowered final self::Class* #this) → (dynamic) →* dynamic
+static method Extension|get#invocations(lowered final self::Class #this) → (dynamic) → dynamic
   return (dynamic value) → dynamic => self::Extension|invocations(#this, value);
-static method Extension|get#tearOffs(lowered final self::Class* #this) → (dynamic) →* dynamic
+static method Extension|get#tearOffs(lowered final self::Class #this) → (dynamic) → dynamic
   return (dynamic value) → dynamic => self::Extension|tearOffs(#this, value);
-static method Extension|tearOffs(lowered final self::Class* #this, dynamic value) → dynamic {
-  () →* dynamic tearOffNoArgs = self::Extension|get#readGetter(#this);
-  tearOffNoArgs(){() →* dynamic};
-  (dynamic) →* dynamic tearOffRequired = self::Extension|get#writeSetterRequired(#this);
-  tearOffRequired(value){(dynamic) →* dynamic};
-  ([dynamic]) →* dynamic tearOffOptional = self::Extension|get#writeSetterOptional(#this);
-  tearOffOptional(){([dynamic]) →* dynamic};
-  tearOffOptional(value){([dynamic]) →* dynamic};
-  ({value: dynamic}) →* dynamic tearOffNamed = self::Extension|get#writeSetterNamed(#this);
-  tearOffNamed(){({value: dynamic}) →* dynamic};
-  tearOffNamed(value: value){({value: dynamic}) →* dynamic};
+static method Extension|tearOffs(lowered final self::Class #this, dynamic value) → dynamic {
+  () → dynamic tearOffNoArgs = self::Extension|get#readGetter(#this);
+  tearOffNoArgs(){() → dynamic};
+  (dynamic) → dynamic tearOffRequired = self::Extension|get#writeSetterRequired(#this);
+  tearOffRequired(value){(dynamic) → dynamic};
+  ([dynamic]) → dynamic tearOffOptional = self::Extension|get#writeSetterOptional(#this);
+  tearOffOptional(){([dynamic]) → dynamic};
+  tearOffOptional(value){([dynamic]) → dynamic};
+  ({value: dynamic}) → dynamic tearOffNamed = self::Extension|get#writeSetterNamed(#this);
+  tearOffNamed(){({value: dynamic}) → dynamic};
+  tearOffNamed(value: value){({value: dynamic}) → dynamic};
 }
-static method Extension|getterCalls(lowered final self::Class* #this, dynamic value) → dynamic {
+static method Extension|getterCalls(lowered final self::Class #this, dynamic value) → dynamic {
   self::Extension|get#tearOffGetterNoArgs(#this){dynamic}.call();
   self::Extension|get#tearOffGetterRequired(#this){dynamic}.call(value);
   self::Extension|get#tearOffGetterOptional(#this){dynamic}.call();
@@ -152,144 +132,144 @@ static method Extension|getterCalls(lowered final self::Class* #this, dynamic va
   self::Extension|get#tearOffGetterNamed(#this){dynamic}.call();
   self::Extension|get#tearOffGetterNamed(#this){dynamic}.call(value: value);
 }
-static method Extension|get#getterCalls(lowered final self::Class* #this) → (dynamic) →* dynamic
+static method Extension|get#getterCalls(lowered final self::Class #this) → (dynamic) → dynamic
   return (dynamic value) → dynamic => self::Extension|getterCalls(#this, value);
-static method GenericExtension|readGetter<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|readGetter::T*>* #this) → self::GenericExtension|readGetter::T* {
-  return self::GenericExtension|get#property<self::GenericExtension|readGetter::T*>(#this);
+static method GenericExtension|readGetter<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|readGetter::T%> #this) → self::GenericExtension|readGetter::T? {
+  return self::GenericExtension|get#property<self::GenericExtension|readGetter::T%>(#this);
 }
-static method GenericExtension|get#readGetter<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#readGetter::T*>* #this) → () →* self::GenericExtension|get#readGetter::T*
-  return () → self::GenericExtension|get#readGetter::T* => self::GenericExtension|readGetter<self::GenericExtension|get#readGetter::T*>(#this);
-static method GenericExtension|writeSetterRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterRequired::T*>* #this, self::GenericExtension|writeSetterRequired::T* value) → dynamic {
-  self::GenericExtension|set#property<self::GenericExtension|writeSetterRequired::T*>(#this, value);
+static method GenericExtension|get#readGetter<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#readGetter::T%> #this) → () → self::GenericExtension|get#readGetter::T?
+  return () → self::GenericExtension|get#readGetter::T? => self::GenericExtension|readGetter<self::GenericExtension|get#readGetter::T%>(#this);
+static method GenericExtension|writeSetterRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterRequired::T%> #this, self::GenericExtension|writeSetterRequired::T% value) → dynamic {
+  self::GenericExtension|set#property<self::GenericExtension|writeSetterRequired::T%>(#this, value);
 }
-static method GenericExtension|get#writeSetterRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterRequired::T*>* #this) → (self::GenericExtension|get#writeSetterRequired::T*) →* dynamic
-  return (self::GenericExtension|get#writeSetterRequired::T* value) → dynamic => self::GenericExtension|writeSetterRequired<self::GenericExtension|get#writeSetterRequired::T*>(#this, value);
-static method GenericExtension|writeSetterOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterOptional::T*>* #this, [self::GenericExtension|writeSetterOptional::T* value = #C1]) → dynamic {
-  self::GenericExtension|set#property<self::GenericExtension|writeSetterOptional::T*>(#this, value);
+static method GenericExtension|get#writeSetterRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterRequired::T%> #this) → (self::GenericExtension|get#writeSetterRequired::T%) → dynamic
+  return (self::GenericExtension|get#writeSetterRequired::T% value) → dynamic => self::GenericExtension|writeSetterRequired<self::GenericExtension|get#writeSetterRequired::T%>(#this, value);
+static method GenericExtension|writeSetterOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterOptional::T%> #this, [self::GenericExtension|writeSetterOptional::T? value = #C1]) → dynamic {
+  self::GenericExtension|set#property<self::GenericExtension|writeSetterOptional::T%>(#this, value);
 }
-static method GenericExtension|get#writeSetterOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterOptional::T*>* #this) → ([self::GenericExtension|get#writeSetterOptional::T*]) →* dynamic
-  return ([self::GenericExtension|get#writeSetterOptional::T* value = #C1]) → dynamic => self::GenericExtension|writeSetterOptional<self::GenericExtension|get#writeSetterOptional::T*>(#this, value);
-static method GenericExtension|writeSetterNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterNamed::T*>* #this, {self::GenericExtension|writeSetterNamed::T* value = #C1}) → dynamic {
-  self::GenericExtension|set#property<self::GenericExtension|writeSetterNamed::T*>(#this, value);
+static method GenericExtension|get#writeSetterOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterOptional::T%> #this) → ([self::GenericExtension|get#writeSetterOptional::T?]) → dynamic
+  return ([self::GenericExtension|get#writeSetterOptional::T? value = #C1]) → dynamic => self::GenericExtension|writeSetterOptional<self::GenericExtension|get#writeSetterOptional::T%>(#this, value);
+static method GenericExtension|writeSetterNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterNamed::T%> #this, {self::GenericExtension|writeSetterNamed::T? value = #C1}) → dynamic {
+  self::GenericExtension|set#property<self::GenericExtension|writeSetterNamed::T%>(#this, value);
 }
-static method GenericExtension|get#writeSetterNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterNamed::T*>* #this) → ({value: self::GenericExtension|get#writeSetterNamed::T*}) →* dynamic
-  return ({self::GenericExtension|get#writeSetterNamed::T* value = #C1}) → dynamic => self::GenericExtension|writeSetterNamed<self::GenericExtension|get#writeSetterNamed::T*>(#this, value: value);
-static method GenericExtension|genericWriteSetterRequired<T extends core::Object* = dynamic, S extends self::GenericExtension|genericWriteSetterRequired::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterRequired::T*>* #this, self::GenericExtension|genericWriteSetterRequired::S* value) → dynamic {
-  self::GenericExtension|set#property<self::GenericExtension|genericWriteSetterRequired::T*>(#this, value);
+static method GenericExtension|get#writeSetterNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterNamed::T%> #this) → ({value: self::GenericExtension|get#writeSetterNamed::T?}) → dynamic
+  return ({self::GenericExtension|get#writeSetterNamed::T? value = #C1}) → dynamic => self::GenericExtension|writeSetterNamed<self::GenericExtension|get#writeSetterNamed::T%>(#this, value: value);
+static method GenericExtension|genericWriteSetterRequired<T extends core::Object? = dynamic, S extends self::GenericExtension|genericWriteSetterRequired::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterRequired::T%> #this, self::GenericExtension|genericWriteSetterRequired::S% value) → dynamic {
+  self::GenericExtension|set#property<self::GenericExtension|genericWriteSetterRequired::T%>(#this, value);
 }
-static method GenericExtension|get#genericWriteSetterRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterRequired::T*>* #this) → <S extends self::GenericExtension|get#genericWriteSetterRequired::T* = dynamic>(S*) →* dynamic
-  return <S extends self::GenericExtension|get#genericWriteSetterRequired::T* = dynamic>(S* value) → dynamic => self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|get#genericWriteSetterRequired::T*, S*>(#this, value);
-static method GenericExtension|genericWriteSetterOptional<T extends core::Object* = dynamic, S extends self::GenericExtension|genericWriteSetterOptional::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterOptional::T*>* #this, [self::GenericExtension|genericWriteSetterOptional::S* value = #C1]) → dynamic {
-  self::GenericExtension|set#property<self::GenericExtension|genericWriteSetterOptional::T*>(#this, value);
+static method GenericExtension|get#genericWriteSetterRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterRequired::T%> #this) → <S extends self::GenericExtension|get#genericWriteSetterRequired::T% = dynamic>(S%) → dynamic
+  return <S extends self::GenericExtension|get#genericWriteSetterRequired::T% = dynamic>(S% value) → dynamic => self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|get#genericWriteSetterRequired::T%, S%>(#this, value);
+static method GenericExtension|genericWriteSetterOptional<T extends core::Object? = dynamic, S extends self::GenericExtension|genericWriteSetterOptional::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterOptional::T%> #this, [self::GenericExtension|genericWriteSetterOptional::S? value = #C1]) → dynamic {
+  self::GenericExtension|set#property<self::GenericExtension|genericWriteSetterOptional::T%>(#this, value);
 }
-static method GenericExtension|get#genericWriteSetterOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterOptional::T*>* #this) → <S extends self::GenericExtension|get#genericWriteSetterOptional::T* = dynamic>([S*]) →* dynamic
-  return <S extends self::GenericExtension|get#genericWriteSetterOptional::T* = dynamic>([S* value = #C1]) → dynamic => self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|get#genericWriteSetterOptional::T*, S*>(#this, value);
-static method GenericExtension|get#genericWriteSetterNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterNamed::T*>* #this) → <S extends self::GenericExtension|get#genericWriteSetterNamed::T* = dynamic>({value: S*}) →* dynamic
-  return <S extends self::GenericExtension|get#genericWriteSetterNamed::T* = dynamic>({S* value = #C1}) → dynamic => self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|get#genericWriteSetterNamed::T*, S*>(#this, value: value);
-static method GenericExtension|genericWriteSetterNamed<T extends core::Object* = dynamic, S extends self::GenericExtension|genericWriteSetterNamed::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterNamed::T*>* #this, {self::GenericExtension|genericWriteSetterNamed::S* value = #C1}) → dynamic {
-  self::GenericExtension|set#property<self::GenericExtension|genericWriteSetterNamed::T*>(#this, value);
+static method GenericExtension|get#genericWriteSetterOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterOptional::T%> #this) → <S extends self::GenericExtension|get#genericWriteSetterOptional::T% = dynamic>([S?]) → dynamic
+  return <S extends self::GenericExtension|get#genericWriteSetterOptional::T% = dynamic>([S? value = #C1]) → dynamic => self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|get#genericWriteSetterOptional::T%, S%>(#this, value);
+static method GenericExtension|get#genericWriteSetterNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterNamed::T%> #this) → <S extends self::GenericExtension|get#genericWriteSetterNamed::T% = dynamic>({value: S?}) → dynamic
+  return <S extends self::GenericExtension|get#genericWriteSetterNamed::T% = dynamic>({S? value = #C1}) → dynamic => self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|get#genericWriteSetterNamed::T%, S%>(#this, value: value);
+static method GenericExtension|genericWriteSetterNamed<T extends core::Object? = dynamic, S extends self::GenericExtension|genericWriteSetterNamed::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterNamed::T%> #this, {self::GenericExtension|genericWriteSetterNamed::S? value = #C1}) → dynamic {
+  self::GenericExtension|set#property<self::GenericExtension|genericWriteSetterNamed::T%>(#this, value);
 }
-static method GenericExtension|get#property<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#property::T*>* #this) → self::GenericExtension|get#property::T*
-  return #this.{self::GenericClass::field}{self::GenericExtension|get#property::T*};
-static method GenericExtension|set#property<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|set#property::T*>* #this, self::GenericExtension|set#property::T* value) → void {
+static method GenericExtension|get#property<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#property::T%> #this) → self::GenericExtension|get#property::T?
+  return #this.{self::GenericClass::field}{self::GenericExtension|get#property::T?};
+static method GenericExtension|set#property<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|set#property::T%> #this, self::GenericExtension|set#property::T? value) → void {
   #this.{self::GenericClass::field} = value;
 }
-static method GenericExtension|get#tearOffGetterNoArgs<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterNoArgs::T*>* #this) → dynamic
-  return self::GenericExtension|get#readGetter<self::GenericExtension|get#tearOffGetterNoArgs::T*>(#this);
-static method GenericExtension|get#tearOffGetterRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterRequired::T*>* #this) → dynamic
-  return self::GenericExtension|get#writeSetterRequired<self::GenericExtension|get#tearOffGetterRequired::T*>(#this);
-static method GenericExtension|get#tearOffGetterOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterOptional::T*>* #this) → dynamic
-  return self::GenericExtension|get#writeSetterOptional<self::GenericExtension|get#tearOffGetterOptional::T*>(#this);
-static method GenericExtension|get#tearOffGetterNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterNamed::T*>* #this) → dynamic
-  return self::GenericExtension|get#writeSetterNamed<self::GenericExtension|get#tearOffGetterNamed::T*>(#this);
-static method GenericExtension|get#tearOffGetterGenericRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericRequired::T*>* #this) → dynamic
-  return self::GenericExtension|get#genericWriteSetterRequired<self::GenericExtension|get#tearOffGetterGenericRequired::T*>(#this);
-static method GenericExtension|get#tearOffGetterGenericOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericOptional::T*>* #this) → dynamic
-  return self::GenericExtension|get#genericWriteSetterOptional<self::GenericExtension|get#tearOffGetterGenericOptional::T*>(#this);
-static method GenericExtension|get#tearOffGetterGenericNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericNamed::T*>* #this) → dynamic
-  return self::GenericExtension|get#genericWriteSetterNamed<self::GenericExtension|get#tearOffGetterGenericNamed::T*>(#this);
-static method GenericExtension|invocations<T extends core::Object* = dynamic, S extends self::GenericExtension|invocations::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|invocations::T*>* #this, self::GenericExtension|invocations::S* value) → dynamic {
-  self::GenericExtension|readGetter<self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|writeSetterRequired<self::GenericExtension|invocations::T*>(#this, value);
-  self::GenericExtension|writeSetterOptional<self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|writeSetterOptional<self::GenericExtension|invocations::T*>(#this, value);
-  self::GenericExtension|writeSetterNamed<self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|writeSetterNamed<self::GenericExtension|invocations::T*>(#this, value: value);
-  self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this, value);
-  self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this, value);
-  self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this, value);
-  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this);
-  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this, value);
-  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this, value);
-  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this, value);
-  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this);
-  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this, value: value);
-  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this, value: value);
-  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this, value: value);
+static method GenericExtension|get#tearOffGetterNoArgs<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterNoArgs::T%> #this) → dynamic
+  return self::GenericExtension|get#readGetter<self::GenericExtension|get#tearOffGetterNoArgs::T%>(#this);
+static method GenericExtension|get#tearOffGetterRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterRequired::T%> #this) → dynamic
+  return self::GenericExtension|get#writeSetterRequired<self::GenericExtension|get#tearOffGetterRequired::T%>(#this);
+static method GenericExtension|get#tearOffGetterOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterOptional::T%> #this) → dynamic
+  return self::GenericExtension|get#writeSetterOptional<self::GenericExtension|get#tearOffGetterOptional::T%>(#this);
+static method GenericExtension|get#tearOffGetterNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterNamed::T%> #this) → dynamic
+  return self::GenericExtension|get#writeSetterNamed<self::GenericExtension|get#tearOffGetterNamed::T%>(#this);
+static method GenericExtension|get#tearOffGetterGenericRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericRequired::T%> #this) → dynamic
+  return self::GenericExtension|get#genericWriteSetterRequired<self::GenericExtension|get#tearOffGetterGenericRequired::T%>(#this);
+static method GenericExtension|get#tearOffGetterGenericOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericOptional::T%> #this) → dynamic
+  return self::GenericExtension|get#genericWriteSetterOptional<self::GenericExtension|get#tearOffGetterGenericOptional::T%>(#this);
+static method GenericExtension|get#tearOffGetterGenericNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericNamed::T%> #this) → dynamic
+  return self::GenericExtension|get#genericWriteSetterNamed<self::GenericExtension|get#tearOffGetterGenericNamed::T%>(#this);
+static method GenericExtension|invocations<T extends core::Object? = dynamic, S extends self::GenericExtension|invocations::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|invocations::T%> #this, self::GenericExtension|invocations::S% value) → dynamic {
+  self::GenericExtension|readGetter<self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|writeSetterRequired<self::GenericExtension|invocations::T%>(#this, value);
+  self::GenericExtension|writeSetterOptional<self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|writeSetterOptional<self::GenericExtension|invocations::T%>(#this, value);
+  self::GenericExtension|writeSetterNamed<self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|writeSetterNamed<self::GenericExtension|invocations::T%>(#this, value: value);
+  self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this, value);
+  self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this, value);
+  self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this, value);
+  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this);
+  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this, value);
+  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this, value);
+  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this, value);
+  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this);
+  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this, value: value);
+  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this, value: value);
+  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this, value: value);
 }
-static method GenericExtension|get#invocations<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#invocations::T*>* #this) → <S extends self::GenericExtension|get#invocations::T* = dynamic>(S*) →* dynamic
-  return <S extends self::GenericExtension|get#invocations::T* = dynamic>(S* value) → dynamic => self::GenericExtension|invocations<self::GenericExtension|get#invocations::T*, S*>(#this, value);
-static method GenericExtension|tearOffs<T extends core::Object* = dynamic, S extends self::GenericExtension|tearOffs::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|tearOffs::T*>* #this, self::GenericExtension|tearOffs::S* value) → dynamic {
-  () →* self::GenericExtension|tearOffs::T* tearOffNoArgs = self::GenericExtension|get#readGetter<self::GenericExtension|tearOffs::T*>(#this);
-  tearOffNoArgs(){() →* self::GenericExtension|tearOffs::T*};
-  (self::GenericExtension|tearOffs::T*) →* dynamic tearOffRequired = self::GenericExtension|get#writeSetterRequired<self::GenericExtension|tearOffs::T*>(#this);
-  tearOffRequired(value){(self::GenericExtension|tearOffs::T*) →* dynamic};
-  ([self::GenericExtension|tearOffs::T*]) →* dynamic tearOffOptional = self::GenericExtension|get#writeSetterOptional<self::GenericExtension|tearOffs::T*>(#this);
-  tearOffOptional(){([self::GenericExtension|tearOffs::T*]) →* dynamic};
-  tearOffOptional(value){([self::GenericExtension|tearOffs::T*]) →* dynamic};
-  ({value: self::GenericExtension|tearOffs::T*}) →* dynamic tearOffNamed = self::GenericExtension|get#writeSetterNamed<self::GenericExtension|tearOffs::T*>(#this);
-  tearOffNamed(){({value: self::GenericExtension|tearOffs::T*}) →* dynamic};
-  tearOffNamed(value: value){({value: self::GenericExtension|tearOffs::T*}) →* dynamic};
-  <S extends self::GenericExtension|tearOffs::T* = dynamic>(S*) →* dynamic genericTearOffRequired = self::GenericExtension|get#genericWriteSetterRequired<self::GenericExtension|tearOffs::T*>(#this);
-  genericTearOffRequired<self::GenericExtension|tearOffs::S*>(value){(self::GenericExtension|tearOffs::S*) →* dynamic};
-  genericTearOffRequired<self::GenericExtension|tearOffs::T*>(value){(self::GenericExtension|tearOffs::T*) →* dynamic};
-  genericTearOffRequired<self::GenericExtension|tearOffs::S*>(value){(self::GenericExtension|tearOffs::S*) →* dynamic};
-  <S extends self::GenericExtension|tearOffs::T* = dynamic>([S*]) →* dynamic genericTearOffOptional = self::GenericExtension|get#genericWriteSetterOptional<self::GenericExtension|tearOffs::T*>(#this);
-  genericTearOffOptional<self::GenericExtension|tearOffs::T*>(){([self::GenericExtension|tearOffs::T*]) →* dynamic};
-  genericTearOffOptional<self::GenericExtension|tearOffs::T*>(){([self::GenericExtension|tearOffs::T*]) →* dynamic};
-  genericTearOffOptional<self::GenericExtension|tearOffs::S*>(){([self::GenericExtension|tearOffs::S*]) →* dynamic};
-  genericTearOffOptional<self::GenericExtension|tearOffs::S*>(value){([self::GenericExtension|tearOffs::S*]) →* dynamic};
-  genericTearOffOptional<self::GenericExtension|tearOffs::T*>(value){([self::GenericExtension|tearOffs::T*]) →* dynamic};
-  genericTearOffOptional<self::GenericExtension|tearOffs::S*>(value){([self::GenericExtension|tearOffs::S*]) →* dynamic};
-  <S extends self::GenericExtension|tearOffs::T* = dynamic>({value: S*}) →* dynamic genericTearOffNamed = self::GenericExtension|get#genericWriteSetterNamed<self::GenericExtension|tearOffs::T*>(#this);
-  genericTearOffNamed<self::GenericExtension|tearOffs::T*>(){({value: self::GenericExtension|tearOffs::T*}) →* dynamic};
-  genericTearOffNamed<self::GenericExtension|tearOffs::T*>(){({value: self::GenericExtension|tearOffs::T*}) →* dynamic};
-  genericTearOffNamed<self::GenericExtension|tearOffs::S*>(){({value: self::GenericExtension|tearOffs::S*}) →* dynamic};
-  genericTearOffNamed<self::GenericExtension|tearOffs::S*>(value: value){({value: self::GenericExtension|tearOffs::S*}) →* dynamic};
-  genericTearOffNamed<self::GenericExtension|tearOffs::T*>(value: value){({value: self::GenericExtension|tearOffs::T*}) →* dynamic};
-  genericTearOffNamed<self::GenericExtension|tearOffs::S*>(value: value){({value: self::GenericExtension|tearOffs::S*}) →* dynamic};
+static method GenericExtension|get#invocations<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#invocations::T%> #this) → <S extends self::GenericExtension|get#invocations::T% = dynamic>(S%) → dynamic
+  return <S extends self::GenericExtension|get#invocations::T% = dynamic>(S% value) → dynamic => self::GenericExtension|invocations<self::GenericExtension|get#invocations::T%, S%>(#this, value);
+static method GenericExtension|tearOffs<T extends core::Object? = dynamic, S extends self::GenericExtension|tearOffs::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|tearOffs::T%> #this, self::GenericExtension|tearOffs::S% value) → dynamic {
+  () → self::GenericExtension|tearOffs::T? tearOffNoArgs = self::GenericExtension|get#readGetter<self::GenericExtension|tearOffs::T%>(#this);
+  tearOffNoArgs(){() → self::GenericExtension|tearOffs::T?};
+  (self::GenericExtension|tearOffs::T%) → dynamic tearOffRequired = self::GenericExtension|get#writeSetterRequired<self::GenericExtension|tearOffs::T%>(#this);
+  tearOffRequired(value){(self::GenericExtension|tearOffs::T%) → dynamic};
+  ([self::GenericExtension|tearOffs::T?]) → dynamic tearOffOptional = self::GenericExtension|get#writeSetterOptional<self::GenericExtension|tearOffs::T%>(#this);
+  tearOffOptional(){([self::GenericExtension|tearOffs::T?]) → dynamic};
+  tearOffOptional(value){([self::GenericExtension|tearOffs::T?]) → dynamic};
+  ({value: self::GenericExtension|tearOffs::T?}) → dynamic tearOffNamed = self::GenericExtension|get#writeSetterNamed<self::GenericExtension|tearOffs::T%>(#this);
+  tearOffNamed(){({value: self::GenericExtension|tearOffs::T?}) → dynamic};
+  tearOffNamed(value: value){({value: self::GenericExtension|tearOffs::T?}) → dynamic};
+  <S extends self::GenericExtension|tearOffs::T% = dynamic>(S%) → dynamic genericTearOffRequired = self::GenericExtension|get#genericWriteSetterRequired<self::GenericExtension|tearOffs::T%>(#this);
+  genericTearOffRequired<self::GenericExtension|tearOffs::S%>(value){(self::GenericExtension|tearOffs::S%) → dynamic};
+  genericTearOffRequired<self::GenericExtension|tearOffs::T%>(value){(self::GenericExtension|tearOffs::T%) → dynamic};
+  genericTearOffRequired<self::GenericExtension|tearOffs::S%>(value){(self::GenericExtension|tearOffs::S%) → dynamic};
+  <S extends self::GenericExtension|tearOffs::T% = dynamic>([S?]) → dynamic genericTearOffOptional = self::GenericExtension|get#genericWriteSetterOptional<self::GenericExtension|tearOffs::T%>(#this);
+  genericTearOffOptional<self::GenericExtension|tearOffs::T%>(){([self::GenericExtension|tearOffs::T?]) → dynamic};
+  genericTearOffOptional<self::GenericExtension|tearOffs::T%>(){([self::GenericExtension|tearOffs::T?]) → dynamic};
+  genericTearOffOptional<self::GenericExtension|tearOffs::S%>(){([self::GenericExtension|tearOffs::S?]) → dynamic};
+  genericTearOffOptional<self::GenericExtension|tearOffs::S%>(value){([self::GenericExtension|tearOffs::S?]) → dynamic};
+  genericTearOffOptional<self::GenericExtension|tearOffs::T%>(value){([self::GenericExtension|tearOffs::T?]) → dynamic};
+  genericTearOffOptional<self::GenericExtension|tearOffs::S%>(value){([self::GenericExtension|tearOffs::S?]) → dynamic};
+  <S extends self::GenericExtension|tearOffs::T% = dynamic>({value: S?}) → dynamic genericTearOffNamed = self::GenericExtension|get#genericWriteSetterNamed<self::GenericExtension|tearOffs::T%>(#this);
+  genericTearOffNamed<self::GenericExtension|tearOffs::T%>(){({value: self::GenericExtension|tearOffs::T?}) → dynamic};
+  genericTearOffNamed<self::GenericExtension|tearOffs::T%>(){({value: self::GenericExtension|tearOffs::T?}) → dynamic};
+  genericTearOffNamed<self::GenericExtension|tearOffs::S%>(){({value: self::GenericExtension|tearOffs::S?}) → dynamic};
+  genericTearOffNamed<self::GenericExtension|tearOffs::S%>(value: value){({value: self::GenericExtension|tearOffs::S?}) → dynamic};
+  genericTearOffNamed<self::GenericExtension|tearOffs::T%>(value: value){({value: self::GenericExtension|tearOffs::T?}) → dynamic};
+  genericTearOffNamed<self::GenericExtension|tearOffs::S%>(value: value){({value: self::GenericExtension|tearOffs::S?}) → dynamic};
 }
-static method GenericExtension|get#tearOffs<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffs::T*>* #this) → <S extends self::GenericExtension|get#tearOffs::T* = dynamic>(S*) →* dynamic
-  return <S extends self::GenericExtension|get#tearOffs::T* = dynamic>(S* value) → dynamic => self::GenericExtension|tearOffs<self::GenericExtension|get#tearOffs::T*, S*>(#this, value);
-static method GenericExtension|getterCalls<T extends core::Object* = dynamic, S extends self::GenericExtension|getterCalls::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|getterCalls::T*>* #this, self::GenericExtension|getterCalls::S* value) → dynamic {
-  self::GenericExtension|get#tearOffGetterNoArgs<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call();
-  self::GenericExtension|get#tearOffGetterRequired<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call(value);
-  self::GenericExtension|get#tearOffGetterOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call();
-  self::GenericExtension|get#tearOffGetterOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call(value);
-  self::GenericExtension|get#tearOffGetterNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call();
-  self::GenericExtension|get#tearOffGetterNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call(value: value);
-  self::GenericExtension|get#tearOffGetterGenericRequired<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call(value);
-  self::GenericExtension|get#tearOffGetterGenericRequired<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::T*>(value);
-  self::GenericExtension|get#tearOffGetterGenericRequired<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::S*>(value);
-  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call();
-  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::T*>();
-  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::S*>();
-  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call(value);
-  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::T*>(value);
-  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::S*>(value);
-  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call();
-  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::T*>();
-  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::S*>();
-  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call(value: value);
-  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::T*>(value: value);
-  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::S*>(value: value);
+static method GenericExtension|get#tearOffs<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffs::T%> #this) → <S extends self::GenericExtension|get#tearOffs::T% = dynamic>(S%) → dynamic
+  return <S extends self::GenericExtension|get#tearOffs::T% = dynamic>(S% value) → dynamic => self::GenericExtension|tearOffs<self::GenericExtension|get#tearOffs::T%, S%>(#this, value);
+static method GenericExtension|getterCalls<T extends core::Object? = dynamic, S extends self::GenericExtension|getterCalls::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|getterCalls::T%> #this, self::GenericExtension|getterCalls::S% value) → dynamic {
+  self::GenericExtension|get#tearOffGetterNoArgs<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call();
+  self::GenericExtension|get#tearOffGetterRequired<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call(value);
+  self::GenericExtension|get#tearOffGetterOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call();
+  self::GenericExtension|get#tearOffGetterOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call(value);
+  self::GenericExtension|get#tearOffGetterNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call();
+  self::GenericExtension|get#tearOffGetterNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call(value: value);
+  self::GenericExtension|get#tearOffGetterGenericRequired<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call(value);
+  self::GenericExtension|get#tearOffGetterGenericRequired<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::T%>(value);
+  self::GenericExtension|get#tearOffGetterGenericRequired<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::S%>(value);
+  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call();
+  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::T%>();
+  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::S%>();
+  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call(value);
+  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::T%>(value);
+  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::S%>(value);
+  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call();
+  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::T%>();
+  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::S%>();
+  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call(value: value);
+  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::T%>(value: value);
+  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::S%>(value: value);
 }
-static method GenericExtension|get#getterCalls<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#getterCalls::T*>* #this) → <S extends self::GenericExtension|get#getterCalls::T* = dynamic>(S*) →* dynamic
-  return <S extends self::GenericExtension|get#getterCalls::T* = dynamic>(S* value) → dynamic => self::GenericExtension|getterCalls<self::GenericExtension|get#getterCalls::T*, S*>(#this, value);
+static method GenericExtension|get#getterCalls<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#getterCalls::T%> #this) → <S extends self::GenericExtension|get#getterCalls::T% = dynamic>(S%) → dynamic
+  return <S extends self::GenericExtension|get#getterCalls::T% = dynamic>(S% value) → dynamic => self::GenericExtension|getterCalls<self::GenericExtension|get#getterCalls::T%, S%>(#this, value);
 static method main() → dynamic {}
 
 constants  {

pkg/front_end/testcases/extensions/direct_instance_access.dart.weak.modular.expect

@@ -1,40 +1,20 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 class Class extends core::Object {
   field dynamic field = null;
-  synthetic constructor •() → self::Class*
+  synthetic constructor •() → self::Class
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-class GenericClass<T extends core::Object* = dynamic> extends core::Object {
-  covariant-by-class field self::GenericClass::T* field = null;
-  synthetic constructor •() → self::GenericClass<self::GenericClass::T*>*
+class GenericClass<T extends core::Object? = dynamic> extends core::Object {
+  covariant-by-class field self::GenericClass::T? field = null;
+  synthetic constructor •() → self::GenericClass<self::GenericClass::T%>
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension Extension on self::Class* {
+extension Extension on self::Class {
   method readGetter = self::Extension|readGetter;
   tearoff readGetter = self::Extension|get#readGetter;
   method writeSetterRequired = self::Extension|writeSetterRequired;
@@ -56,7 +36,7 @@ extension Extension on self::Class* {
   tearoff getterCalls = self::Extension|get#getterCalls;
   set property = self::Extension|set#property;
 }
-extension GenericExtension<T extends core::Object* = dynamic> on self::GenericClass<T*>* {
+extension GenericExtension<T extends core::Object? = dynamic> on self::GenericClass<T%> {
   method readGetter = self::GenericExtension|readGetter;
   tearoff readGetter = self::GenericExtension|get#readGetter;
   method writeSetterRequired = self::GenericExtension|writeSetterRequired;
@@ -87,40 +67,40 @@ extension GenericExtension<T extends core::Object* = dynamic> on self::GenericCl
   tearoff getterCalls = self::GenericExtension|get#getterCalls;
   set property = self::GenericExtension|set#property;
 }
-static method Extension|get#readGetter(lowered final self::Class* #this) → () →* dynamic
+static method Extension|get#readGetter(lowered final self::Class #this) → () → dynamic
   return () → dynamic => self::Extension|readGetter(#this);
-static method Extension|readGetter(lowered final self::Class* #this) → dynamic {
+static method Extension|readGetter(lowered final self::Class #this) → dynamic {
   return self::Extension|get#property(#this);
 }
-static method Extension|writeSetterRequired(lowered final self::Class* #this, dynamic value) → dynamic {
+static method Extension|writeSetterRequired(lowered final self::Class #this, dynamic value) → dynamic {
   self::Extension|set#property(#this, value);
 }
-static method Extension|get#writeSetterRequired(lowered final self::Class* #this) → (dynamic) →* dynamic
+static method Extension|get#writeSetterRequired(lowered final self::Class #this) → (dynamic) → dynamic
   return (dynamic value) → dynamic => self::Extension|writeSetterRequired(#this, value);
-static method Extension|writeSetterOptional(lowered final self::Class* #this, [dynamic value = #C1]) → dynamic {
+static method Extension|writeSetterOptional(lowered final self::Class #this, [dynamic value = #C1]) → dynamic {
   self::Extension|set#property(#this, value);
 }
-static method Extension|get#writeSetterOptional(lowered final self::Class* #this) → ([dynamic]) →* dynamic
+static method Extension|get#writeSetterOptional(lowered final self::Class #this) → ([dynamic]) → dynamic
   return ([dynamic value = #C1]) → dynamic => self::Extension|writeSetterOptional(#this, value);
-static method Extension|writeSetterNamed(lowered final self::Class* #this, {dynamic value = #C1}) → dynamic {
+static method Extension|writeSetterNamed(lowered final self::Class #this, {dynamic value = #C1}) → dynamic {
   self::Extension|set#property(#this, value);
 }
-static method Extension|get#writeSetterNamed(lowered final self::Class* #this) → ({value: dynamic}) →* dynamic
+static method Extension|get#writeSetterNamed(lowered final self::Class #this) → ({value: dynamic}) → dynamic
   return ({dynamic value = #C1}) → dynamic => self::Extension|writeSetterNamed(#this, value: value);
-static method Extension|get#tearOffGetterNoArgs(lowered final self::Class* #this) → dynamic
+static method Extension|get#tearOffGetterNoArgs(lowered final self::Class #this) → dynamic
   return self::Extension|get#readGetter(#this);
-static method Extension|get#tearOffGetterRequired(lowered final self::Class* #this) → dynamic
+static method Extension|get#tearOffGetterRequired(lowered final self::Class #this) → dynamic
   return self::Extension|get#writeSetterRequired(#this);
-static method Extension|get#tearOffGetterOptional(lowered final self::Class* #this) → dynamic
+static method Extension|get#tearOffGetterOptional(lowered final self::Class #this) → dynamic
   return self::Extension|get#writeSetterOptional(#this);
-static method Extension|get#tearOffGetterNamed(lowered final self::Class* #this) → dynamic
+static method Extension|get#tearOffGetterNamed(lowered final self::Class #this) → dynamic
   return self::Extension|get#writeSetterNamed(#this);
-static method Extension|get#property(lowered final self::Class* #this) → dynamic
+static method Extension|get#property(lowered final self::Class #this) → dynamic
   return #this.{self::Class::field}{dynamic};
-static method Extension|set#property(lowered final self::Class* #this, dynamic value) → void {
+static method Extension|set#property(lowered final self::Class #this, dynamic value) → void {
   #this.{self::Class::field} = value;
 }
-static method Extension|invocations(lowered final self::Class* #this, dynamic value) → dynamic {
+static method Extension|invocations(lowered final self::Class #this, dynamic value) → dynamic {
   self::Extension|readGetter(#this);
   self::Extension|writeSetterRequired(#this, value);
   self::Extension|writeSetterOptional(#this);
@@ -128,23 +108,23 @@ static method Extension|invocations(lowered final self::Class* #this, dynamic va
   self::Extension|writeSetterNamed(#this);
   self::Extension|writeSetterNamed(#this, value: value);
 }
-static method Extension|get#invocations(lowered final self::Class* #this) → (dynamic) →* dynamic
+static method Extension|get#invocations(lowered final self::Class #this) → (dynamic) → dynamic
   return (dynamic value) → dynamic => self::Extension|invocations(#this, value);
-static method Extension|get#tearOffs(lowered final self::Class* #this) → (dynamic) →* dynamic
+static method Extension|get#tearOffs(lowered final self::Class #this) → (dynamic) → dynamic
   return (dynamic value) → dynamic => self::Extension|tearOffs(#this, value);
-static method Extension|tearOffs(lowered final self::Class* #this, dynamic value) → dynamic {
-  () →* dynamic tearOffNoArgs = self::Extension|get#readGetter(#this);
-  tearOffNoArgs(){() →* dynamic};
-  (dynamic) →* dynamic tearOffRequired = self::Extension|get#writeSetterRequired(#this);
-  tearOffRequired(value){(dynamic) →* dynamic};
-  ([dynamic]) →* dynamic tearOffOptional = self::Extension|get#writeSetterOptional(#this);
-  tearOffOptional(){([dynamic]) →* dynamic};
-  tearOffOptional(value){([dynamic]) →* dynamic};
-  ({value: dynamic}) →* dynamic tearOffNamed = self::Extension|get#writeSetterNamed(#this);
-  tearOffNamed(){({value: dynamic}) →* dynamic};
-  tearOffNamed(value: value){({value: dynamic}) →* dynamic};
+static method Extension|tearOffs(lowered final self::Class #this, dynamic value) → dynamic {
+  () → dynamic tearOffNoArgs = self::Extension|get#readGetter(#this);
+  tearOffNoArgs(){() → dynamic};
+  (dynamic) → dynamic tearOffRequired = self::Extension|get#writeSetterRequired(#this);
+  tearOffRequired(value){(dynamic) → dynamic};
+  ([dynamic]) → dynamic tearOffOptional = self::Extension|get#writeSetterOptional(#this);
+  tearOffOptional(){([dynamic]) → dynamic};
+  tearOffOptional(value){([dynamic]) → dynamic};
+  ({value: dynamic}) → dynamic tearOffNamed = self::Extension|get#writeSetterNamed(#this);
+  tearOffNamed(){({value: dynamic}) → dynamic};
+  tearOffNamed(value: value){({value: dynamic}) → dynamic};
 }
-static method Extension|getterCalls(lowered final self::Class* #this, dynamic value) → dynamic {
+static method Extension|getterCalls(lowered final self::Class #this, dynamic value) → dynamic {
   self::Extension|get#tearOffGetterNoArgs(#this){dynamic}.call();
   self::Extension|get#tearOffGetterRequired(#this){dynamic}.call(value);
   self::Extension|get#tearOffGetterOptional(#this){dynamic}.call();
@@ -152,144 +132,144 @@ static method Extension|getterCalls(lowered final self::Class* #this, dynamic va
   self::Extension|get#tearOffGetterNamed(#this){dynamic}.call();
   self::Extension|get#tearOffGetterNamed(#this){dynamic}.call(value: value);
 }
-static method Extension|get#getterCalls(lowered final self::Class* #this) → (dynamic) →* dynamic
+static method Extension|get#getterCalls(lowered final self::Class #this) → (dynamic) → dynamic
   return (dynamic value) → dynamic => self::Extension|getterCalls(#this, value);
-static method GenericExtension|readGetter<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|readGetter::T*>* #this) → self::GenericExtension|readGetter::T* {
-  return self::GenericExtension|get#property<self::GenericExtension|readGetter::T*>(#this);
+static method GenericExtension|readGetter<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|readGetter::T%> #this) → self::GenericExtension|readGetter::T? {
+  return self::GenericExtension|get#property<self::GenericExtension|readGetter::T%>(#this);
 }
-static method GenericExtension|get#readGetter<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#readGetter::T*>* #this) → () →* self::GenericExtension|get#readGetter::T*
-  return () → self::GenericExtension|get#readGetter::T* => self::GenericExtension|readGetter<self::GenericExtension|get#readGetter::T*>(#this);
-static method GenericExtension|writeSetterRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterRequired::T*>* #this, self::GenericExtension|writeSetterRequired::T* value) → dynamic {
-  self::GenericExtension|set#property<self::GenericExtension|writeSetterRequired::T*>(#this, value);
+static method GenericExtension|get#readGetter<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#readGetter::T%> #this) → () → self::GenericExtension|get#readGetter::T?
+  return () → self::GenericExtension|get#readGetter::T? => self::GenericExtension|readGetter<self::GenericExtension|get#readGetter::T%>(#this);
+static method GenericExtension|writeSetterRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterRequired::T%> #this, self::GenericExtension|writeSetterRequired::T% value) → dynamic {
+  self::GenericExtension|set#property<self::GenericExtension|writeSetterRequired::T%>(#this, value);
 }
-static method GenericExtension|get#writeSetterRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterRequired::T*>* #this) → (self::GenericExtension|get#writeSetterRequired::T*) →* dynamic
-  return (self::GenericExtension|get#writeSetterRequired::T* value) → dynamic => self::GenericExtension|writeSetterRequired<self::GenericExtension|get#writeSetterRequired::T*>(#this, value);
-static method GenericExtension|writeSetterOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterOptional::T*>* #this, [self::GenericExtension|writeSetterOptional::T* value = #C1]) → dynamic {
-  self::GenericExtension|set#property<self::GenericExtension|writeSetterOptional::T*>(#this, value);
+static method GenericExtension|get#writeSetterRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterRequired::T%> #this) → (self::GenericExtension|get#writeSetterRequired::T%) → dynamic
+  return (self::GenericExtension|get#writeSetterRequired::T% value) → dynamic => self::GenericExtension|writeSetterRequired<self::GenericExtension|get#writeSetterRequired::T%>(#this, value);
+static method GenericExtension|writeSetterOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterOptional::T%> #this, [self::GenericExtension|writeSetterOptional::T? value = #C1]) → dynamic {
+  self::GenericExtension|set#property<self::GenericExtension|writeSetterOptional::T%>(#this, value);
 }
-static method GenericExtension|get#writeSetterOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterOptional::T*>* #this) → ([self::GenericExtension|get#writeSetterOptional::T*]) →* dynamic
-  return ([self::GenericExtension|get#writeSetterOptional::T* value = #C1]) → dynamic => self::GenericExtension|writeSetterOptional<self::GenericExtension|get#writeSetterOptional::T*>(#this, value);
-static method GenericExtension|writeSetterNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterNamed::T*>* #this, {self::GenericExtension|writeSetterNamed::T* value = #C1}) → dynamic {
-  self::GenericExtension|set#property<self::GenericExtension|writeSetterNamed::T*>(#this, value);
+static method GenericExtension|get#writeSetterOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterOptional::T%> #this) → ([self::GenericExtension|get#writeSetterOptional::T?]) → dynamic
+  return ([self::GenericExtension|get#writeSetterOptional::T? value = #C1]) → dynamic => self::GenericExtension|writeSetterOptional<self::GenericExtension|get#writeSetterOptional::T%>(#this, value);
+static method GenericExtension|writeSetterNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterNamed::T%> #this, {self::GenericExtension|writeSetterNamed::T? value = #C1}) → dynamic {
+  self::GenericExtension|set#property<self::GenericExtension|writeSetterNamed::T%>(#this, value);
 }
-static method GenericExtension|get#writeSetterNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterNamed::T*>* #this) → ({value: self::GenericExtension|get#writeSetterNamed::T*}) →* dynamic
-  return ({self::GenericExtension|get#writeSetterNamed::T* value = #C1}) → dynamic => self::GenericExtension|writeSetterNamed<self::GenericExtension|get#writeSetterNamed::T*>(#this, value: value);
-static method GenericExtension|genericWriteSetterRequired<T extends core::Object* = dynamic, S extends self::GenericExtension|genericWriteSetterRequired::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterRequired::T*>* #this, self::GenericExtension|genericWriteSetterRequired::S* value) → dynamic {
-  self::GenericExtension|set#property<self::GenericExtension|genericWriteSetterRequired::T*>(#this, value);
+static method GenericExtension|get#writeSetterNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterNamed::T%> #this) → ({value: self::GenericExtension|get#writeSetterNamed::T?}) → dynamic
+  return ({self::GenericExtension|get#writeSetterNamed::T? value = #C1}) → dynamic => self::GenericExtension|writeSetterNamed<self::GenericExtension|get#writeSetterNamed::T%>(#this, value: value);
+static method GenericExtension|genericWriteSetterRequired<T extends core::Object? = dynamic, S extends self::GenericExtension|genericWriteSetterRequired::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterRequired::T%> #this, self::GenericExtension|genericWriteSetterRequired::S% value) → dynamic {
+  self::GenericExtension|set#property<self::GenericExtension|genericWriteSetterRequired::T%>(#this, value);
 }
-static method GenericExtension|get#genericWriteSetterRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterRequired::T*>* #this) → <S extends self::GenericExtension|get#genericWriteSetterRequired::T* = dynamic>(S*) →* dynamic
-  return <S extends self::GenericExtension|get#genericWriteSetterRequired::T* = dynamic>(S* value) → dynamic => self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|get#genericWriteSetterRequired::T*, S*>(#this, value);
-static method GenericExtension|genericWriteSetterOptional<T extends core::Object* = dynamic, S extends self::GenericExtension|genericWriteSetterOptional::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterOptional::T*>* #this, [self::GenericExtension|genericWriteSetterOptional::S* value = #C1]) → dynamic {
-  self::GenericExtension|set#property<self::GenericExtension|genericWriteSetterOptional::T*>(#this, value);
+static method GenericExtension|get#genericWriteSetterRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterRequired::T%> #this) → <S extends self::GenericExtension|get#genericWriteSetterRequired::T% = dynamic>(S%) → dynamic
+  return <S extends self::GenericExtension|get#genericWriteSetterRequired::T% = dynamic>(S% value) → dynamic => self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|get#genericWriteSetterRequired::T%, S%>(#this, value);
+static method GenericExtension|genericWriteSetterOptional<T extends core::Object? = dynamic, S extends self::GenericExtension|genericWriteSetterOptional::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterOptional::T%> #this, [self::GenericExtension|genericWriteSetterOptional::S? value = #C1]) → dynamic {
+  self::GenericExtension|set#property<self::GenericExtension|genericWriteSetterOptional::T%>(#this, value);
 }
-static method GenericExtension|get#genericWriteSetterOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterOptional::T*>* #this) → <S extends self::GenericExtension|get#genericWriteSetterOptional::T* = dynamic>([S*]) →* dynamic
-  return <S extends self::GenericExtension|get#genericWriteSetterOptional::T* = dynamic>([S* value = #C1]) → dynamic => self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|get#genericWriteSetterOptional::T*, S*>(#this, value);
-static method GenericExtension|get#genericWriteSetterNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterNamed::T*>* #this) → <S extends self::GenericExtension|get#genericWriteSetterNamed::T* = dynamic>({value: S*}) →* dynamic
-  return <S extends self::GenericExtension|get#genericWriteSetterNamed::T* = dynamic>({S* value = #C1}) → dynamic => self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|get#genericWriteSetterNamed::T*, S*>(#this, value: value);
-static method GenericExtension|genericWriteSetterNamed<T extends core::Object* = dynamic, S extends self::GenericExtension|genericWriteSetterNamed::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterNamed::T*>* #this, {self::GenericExtension|genericWriteSetterNamed::S* value = #C1}) → dynamic {
-  self::GenericExtension|set#property<self::GenericExtension|genericWriteSetterNamed::T*>(#this, value);
+static method GenericExtension|get#genericWriteSetterOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterOptional::T%> #this) → <S extends self::GenericExtension|get#genericWriteSetterOptional::T% = dynamic>([S?]) → dynamic
+  return <S extends self::GenericExtension|get#genericWriteSetterOptional::T% = dynamic>([S? value = #C1]) → dynamic => self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|get#genericWriteSetterOptional::T%, S%>(#this, value);
+static method GenericExtension|get#genericWriteSetterNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterNamed::T%> #this) → <S extends self::GenericExtension|get#genericWriteSetterNamed::T% = dynamic>({value: S?}) → dynamic
+  return <S extends self::GenericExtension|get#genericWriteSetterNamed::T% = dynamic>({S? value = #C1}) → dynamic => self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|get#genericWriteSetterNamed::T%, S%>(#this, value: value);
+static method GenericExtension|genericWriteSetterNamed<T extends core::Object? = dynamic, S extends self::GenericExtension|genericWriteSetterNamed::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterNamed::T%> #this, {self::GenericExtension|genericWriteSetterNamed::S? value = #C1}) → dynamic {
+  self::GenericExtension|set#property<self::GenericExtension|genericWriteSetterNamed::T%>(#this, value);
 }
-static method GenericExtension|get#property<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#property::T*>* #this) → self::GenericExtension|get#property::T*
-  return #this.{self::GenericClass::field}{self::GenericExtension|get#property::T*};
-static method GenericExtension|set#property<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|set#property::T*>* #this, self::GenericExtension|set#property::T* value) → void {
+static method GenericExtension|get#property<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#property::T%> #this) → self::GenericExtension|get#property::T?
+  return #this.{self::GenericClass::field}{self::GenericExtension|get#property::T?};
+static method GenericExtension|set#property<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|set#property::T%> #this, self::GenericExtension|set#property::T? value) → void {
   #this.{self::GenericClass::field} = value;
 }
-static method GenericExtension|get#tearOffGetterNoArgs<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterNoArgs::T*>* #this) → dynamic
-  return self::GenericExtension|get#readGetter<self::GenericExtension|get#tearOffGetterNoArgs::T*>(#this);
-static method GenericExtension|get#tearOffGetterRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterRequired::T*>* #this) → dynamic
-  return self::GenericExtension|get#writeSetterRequired<self::GenericExtension|get#tearOffGetterRequired::T*>(#this);
-static method GenericExtension|get#tearOffGetterOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterOptional::T*>* #this) → dynamic
-  return self::GenericExtension|get#writeSetterOptional<self::GenericExtension|get#tearOffGetterOptional::T*>(#this);
-static method GenericExtension|get#tearOffGetterNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterNamed::T*>* #this) → dynamic
-  return self::GenericExtension|get#writeSetterNamed<self::GenericExtension|get#tearOffGetterNamed::T*>(#this);
-static method GenericExtension|get#tearOffGetterGenericRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericRequired::T*>* #this) → dynamic
-  return self::GenericExtension|get#genericWriteSetterRequired<self::GenericExtension|get#tearOffGetterGenericRequired::T*>(#this);
-static method GenericExtension|get#tearOffGetterGenericOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericOptional::T*>* #this) → dynamic
-  return self::GenericExtension|get#genericWriteSetterOptional<self::GenericExtension|get#tearOffGetterGenericOptional::T*>(#this);
-static method GenericExtension|get#tearOffGetterGenericNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericNamed::T*>* #this) → dynamic
-  return self::GenericExtension|get#genericWriteSetterNamed<self::GenericExtension|get#tearOffGetterGenericNamed::T*>(#this);
-static method GenericExtension|invocations<T extends core::Object* = dynamic, S extends self::GenericExtension|invocations::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|invocations::T*>* #this, self::GenericExtension|invocations::S* value) → dynamic {
-  self::GenericExtension|readGetter<self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|writeSetterRequired<self::GenericExtension|invocations::T*>(#this, value);
-  self::GenericExtension|writeSetterOptional<self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|writeSetterOptional<self::GenericExtension|invocations::T*>(#this, value);
-  self::GenericExtension|writeSetterNamed<self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|writeSetterNamed<self::GenericExtension|invocations::T*>(#this, value: value);
-  self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this, value);
-  self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this, value);
-  self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this, value);
-  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this);
-  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this, value);
-  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this, value);
-  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this, value);
-  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this);
-  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this, value: value);
-  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this, value: value);
-  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this, value: value);
+static method GenericExtension|get#tearOffGetterNoArgs<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterNoArgs::T%> #this) → dynamic
+  return self::GenericExtension|get#readGetter<self::GenericExtension|get#tearOffGetterNoArgs::T%>(#this);
+static method GenericExtension|get#tearOffGetterRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterRequired::T%> #this) → dynamic
+  return self::GenericExtension|get#writeSetterRequired<self::GenericExtension|get#tearOffGetterRequired::T%>(#this);
+static method GenericExtension|get#tearOffGetterOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterOptional::T%> #this) → dynamic
+  return self::GenericExtension|get#writeSetterOptional<self::GenericExtension|get#tearOffGetterOptional::T%>(#this);
+static method GenericExtension|get#tearOffGetterNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterNamed::T%> #this) → dynamic
+  return self::GenericExtension|get#writeSetterNamed<self::GenericExtension|get#tearOffGetterNamed::T%>(#this);
+static method GenericExtension|get#tearOffGetterGenericRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericRequired::T%> #this) → dynamic
+  return self::GenericExtension|get#genericWriteSetterRequired<self::GenericExtension|get#tearOffGetterGenericRequired::T%>(#this);
+static method GenericExtension|get#tearOffGetterGenericOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericOptional::T%> #this) → dynamic
+  return self::GenericExtension|get#genericWriteSetterOptional<self::GenericExtension|get#tearOffGetterGenericOptional::T%>(#this);
+static method GenericExtension|get#tearOffGetterGenericNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericNamed::T%> #this) → dynamic
+  return self::GenericExtension|get#genericWriteSetterNamed<self::GenericExtension|get#tearOffGetterGenericNamed::T%>(#this);
+static method GenericExtension|invocations<T extends core::Object? = dynamic, S extends self::GenericExtension|invocations::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|invocations::T%> #this, self::GenericExtension|invocations::S% value) → dynamic {
+  self::GenericExtension|readGetter<self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|writeSetterRequired<self::GenericExtension|invocations::T%>(#this, value);
+  self::GenericExtension|writeSetterOptional<self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|writeSetterOptional<self::GenericExtension|invocations::T%>(#this, value);
+  self::GenericExtension|writeSetterNamed<self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|writeSetterNamed<self::GenericExtension|invocations::T%>(#this, value: value);
+  self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this, value);
+  self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this, value);
+  self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this, value);
+  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this);
+  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this, value);
+  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this, value);
+  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this, value);
+  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this);
+  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this, value: value);
+  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this, value: value);
+  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this, value: value);
 }
-static method GenericExtension|get#invocations<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#invocations::T*>* #this) → <S extends self::GenericExtension|get#invocations::T* = dynamic>(S*) →* dynamic
-  return <S extends self::GenericExtension|get#invocations::T* = dynamic>(S* value) → dynamic => self::GenericExtension|invocations<self::GenericExtension|get#invocations::T*, S*>(#this, value);
-static method GenericExtension|tearOffs<T extends core::Object* = dynamic, S extends self::GenericExtension|tearOffs::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|tearOffs::T*>* #this, self::GenericExtension|tearOffs::S* value) → dynamic {
-  () →* self::GenericExtension|tearOffs::T* tearOffNoArgs = self::GenericExtension|get#readGetter<self::GenericExtension|tearOffs::T*>(#this);
-  tearOffNoArgs(){() →* self::GenericExtension|tearOffs::T*};
-  (self::GenericExtension|tearOffs::T*) →* dynamic tearOffRequired = self::GenericExtension|get#writeSetterRequired<self::GenericExtension|tearOffs::T*>(#this);
-  tearOffRequired(value){(self::GenericExtension|tearOffs::T*) →* dynamic};
-  ([self::GenericExtension|tearOffs::T*]) →* dynamic tearOffOptional = self::GenericExtension|get#writeSetterOptional<self::GenericExtension|tearOffs::T*>(#this);
-  tearOffOptional(){([self::GenericExtension|tearOffs::T*]) →* dynamic};
-  tearOffOptional(value){([self::GenericExtension|tearOffs::T*]) →* dynamic};
-  ({value: self::GenericExtension|tearOffs::T*}) →* dynamic tearOffNamed = self::GenericExtension|get#writeSetterNamed<self::GenericExtension|tearOffs::T*>(#this);
-  tearOffNamed(){({value: self::GenericExtension|tearOffs::T*}) →* dynamic};
-  tearOffNamed(value: value){({value: self::GenericExtension|tearOffs::T*}) →* dynamic};
-  <S extends self::GenericExtension|tearOffs::T* = dynamic>(S*) →* dynamic genericTearOffRequired = self::GenericExtension|get#genericWriteSetterRequired<self::GenericExtension|tearOffs::T*>(#this);
-  genericTearOffRequired<self::GenericExtension|tearOffs::S*>(value){(self::GenericExtension|tearOffs::S*) →* dynamic};
-  genericTearOffRequired<self::GenericExtension|tearOffs::T*>(value){(self::GenericExtension|tearOffs::T*) →* dynamic};
-  genericTearOffRequired<self::GenericExtension|tearOffs::S*>(value){(self::GenericExtension|tearOffs::S*) →* dynamic};
-  <S extends self::GenericExtension|tearOffs::T* = dynamic>([S*]) →* dynamic genericTearOffOptional = self::GenericExtension|get#genericWriteSetterOptional<self::GenericExtension|tearOffs::T*>(#this);
-  genericTearOffOptional<self::GenericExtension|tearOffs::T*>(){([self::GenericExtension|tearOffs::T*]) →* dynamic};
-  genericTearOffOptional<self::GenericExtension|tearOffs::T*>(){([self::GenericExtension|tearOffs::T*]) →* dynamic};
-  genericTearOffOptional<self::GenericExtension|tearOffs::S*>(){([self::GenericExtension|tearOffs::S*]) →* dynamic};
-  genericTearOffOptional<self::GenericExtension|tearOffs::S*>(value){([self::GenericExtension|tearOffs::S*]) →* dynamic};
-  genericTearOffOptional<self::GenericExtension|tearOffs::T*>(value){([self::GenericExtension|tearOffs::T*]) →* dynamic};
-  genericTearOffOptional<self::GenericExtension|tearOffs::S*>(value){([self::GenericExtension|tearOffs::S*]) →* dynamic};
-  <S extends self::GenericExtension|tearOffs::T* = dynamic>({value: S*}) →* dynamic genericTearOffNamed = self::GenericExtension|get#genericWriteSetterNamed<self::GenericExtension|tearOffs::T*>(#this);
-  genericTearOffNamed<self::GenericExtension|tearOffs::T*>(){({value: self::GenericExtension|tearOffs::T*}) →* dynamic};
-  genericTearOffNamed<self::GenericExtension|tearOffs::T*>(){({value: self::GenericExtension|tearOffs::T*}) →* dynamic};
-  genericTearOffNamed<self::GenericExtension|tearOffs::S*>(){({value: self::GenericExtension|tearOffs::S*}) →* dynamic};
-  genericTearOffNamed<self::GenericExtension|tearOffs::S*>(value: value){({value: self::GenericExtension|tearOffs::S*}) →* dynamic};
-  genericTearOffNamed<self::GenericExtension|tearOffs::T*>(value: value){({value: self::GenericExtension|tearOffs::T*}) →* dynamic};
-  genericTearOffNamed<self::GenericExtension|tearOffs::S*>(value: value){({value: self::GenericExtension|tearOffs::S*}) →* dynamic};
+static method GenericExtension|get#invocations<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#invocations::T%> #this) → <S extends self::GenericExtension|get#invocations::T% = dynamic>(S%) → dynamic
+  return <S extends self::GenericExtension|get#invocations::T% = dynamic>(S% value) → dynamic => self::GenericExtension|invocations<self::GenericExtension|get#invocations::T%, S%>(#this, value);
+static method GenericExtension|tearOffs<T extends core::Object? = dynamic, S extends self::GenericExtension|tearOffs::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|tearOffs::T%> #this, self::GenericExtension|tearOffs::S% value) → dynamic {
+  () → self::GenericExtension|tearOffs::T? tearOffNoArgs = self::GenericExtension|get#readGetter<self::GenericExtension|tearOffs::T%>(#this);
+  tearOffNoArgs(){() → self::GenericExtension|tearOffs::T?};
+  (self::GenericExtension|tearOffs::T%) → dynamic tearOffRequired = self::GenericExtension|get#writeSetterRequired<self::GenericExtension|tearOffs::T%>(#this);
+  tearOffRequired(value){(self::GenericExtension|tearOffs::T%) → dynamic};
+  ([self::GenericExtension|tearOffs::T?]) → dynamic tearOffOptional = self::GenericExtension|get#writeSetterOptional<self::GenericExtension|tearOffs::T%>(#this);
+  tearOffOptional(){([self::GenericExtension|tearOffs::T?]) → dynamic};
+  tearOffOptional(value){([self::GenericExtension|tearOffs::T?]) → dynamic};
+  ({value: self::GenericExtension|tearOffs::T?}) → dynamic tearOffNamed = self::GenericExtension|get#writeSetterNamed<self::GenericExtension|tearOffs::T%>(#this);
+  tearOffNamed(){({value: self::GenericExtension|tearOffs::T?}) → dynamic};
+  tearOffNamed(value: value){({value: self::GenericExtension|tearOffs::T?}) → dynamic};
+  <S extends self::GenericExtension|tearOffs::T% = dynamic>(S%) → dynamic genericTearOffRequired = self::GenericExtension|get#genericWriteSetterRequired<self::GenericExtension|tearOffs::T%>(#this);
+  genericTearOffRequired<self::GenericExtension|tearOffs::S%>(value){(self::GenericExtension|tearOffs::S%) → dynamic};
+  genericTearOffRequired<self::GenericExtension|tearOffs::T%>(value){(self::GenericExtension|tearOffs::T%) → dynamic};
+  genericTearOffRequired<self::GenericExtension|tearOffs::S%>(value){(self::GenericExtension|tearOffs::S%) → dynamic};
+  <S extends self::GenericExtension|tearOffs::T% = dynamic>([S?]) → dynamic genericTearOffOptional = self::GenericExtension|get#genericWriteSetterOptional<self::GenericExtension|tearOffs::T%>(#this);
+  genericTearOffOptional<self::GenericExtension|tearOffs::T%>(){([self::GenericExtension|tearOffs::T?]) → dynamic};
+  genericTearOffOptional<self::GenericExtension|tearOffs::T%>(){([self::GenericExtension|tearOffs::T?]) → dynamic};
+  genericTearOffOptional<self::GenericExtension|tearOffs::S%>(){([self::GenericExtension|tearOffs::S?]) → dynamic};
+  genericTearOffOptional<self::GenericExtension|tearOffs::S%>(value){([self::GenericExtension|tearOffs::S?]) → dynamic};
+  genericTearOffOptional<self::GenericExtension|tearOffs::T%>(value){([self::GenericExtension|tearOffs::T?]) → dynamic};
+  genericTearOffOptional<self::GenericExtension|tearOffs::S%>(value){([self::GenericExtension|tearOffs::S?]) → dynamic};
+  <S extends self::GenericExtension|tearOffs::T% = dynamic>({value: S?}) → dynamic genericTearOffNamed = self::GenericExtension|get#genericWriteSetterNamed<self::GenericExtension|tearOffs::T%>(#this);
+  genericTearOffNamed<self::GenericExtension|tearOffs::T%>(){({value: self::GenericExtension|tearOffs::T?}) → dynamic};
+  genericTearOffNamed<self::GenericExtension|tearOffs::T%>(){({value: self::GenericExtension|tearOffs::T?}) → dynamic};
+  genericTearOffNamed<self::GenericExtension|tearOffs::S%>(){({value: self::GenericExtension|tearOffs::S?}) → dynamic};
+  genericTearOffNamed<self::GenericExtension|tearOffs::S%>(value: value){({value: self::GenericExtension|tearOffs::S?}) → dynamic};
+  genericTearOffNamed<self::GenericExtension|tearOffs::T%>(value: value){({value: self::GenericExtension|tearOffs::T?}) → dynamic};
+  genericTearOffNamed<self::GenericExtension|tearOffs::S%>(value: value){({value: self::GenericExtension|tearOffs::S?}) → dynamic};
 }
-static method GenericExtension|get#tearOffs<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffs::T*>* #this) → <S extends self::GenericExtension|get#tearOffs::T* = dynamic>(S*) →* dynamic
-  return <S extends self::GenericExtension|get#tearOffs::T* = dynamic>(S* value) → dynamic => self::GenericExtension|tearOffs<self::GenericExtension|get#tearOffs::T*, S*>(#this, value);
-static method GenericExtension|getterCalls<T extends core::Object* = dynamic, S extends self::GenericExtension|getterCalls::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|getterCalls::T*>* #this, self::GenericExtension|getterCalls::S* value) → dynamic {
-  self::GenericExtension|get#tearOffGetterNoArgs<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call();
-  self::GenericExtension|get#tearOffGetterRequired<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call(value);
-  self::GenericExtension|get#tearOffGetterOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call();
-  self::GenericExtension|get#tearOffGetterOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call(value);
-  self::GenericExtension|get#tearOffGetterNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call();
-  self::GenericExtension|get#tearOffGetterNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call(value: value);
-  self::GenericExtension|get#tearOffGetterGenericRequired<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call(value);
-  self::GenericExtension|get#tearOffGetterGenericRequired<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::T*>(value);
-  self::GenericExtension|get#tearOffGetterGenericRequired<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::S*>(value);
-  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call();
-  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::T*>();
-  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::S*>();
-  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call(value);
-  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::T*>(value);
-  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::S*>(value);
-  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call();
-  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::T*>();
-  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::S*>();
-  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call(value: value);
-  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::T*>(value: value);
-  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::S*>(value: value);
+static method GenericExtension|get#tearOffs<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffs::T%> #this) → <S extends self::GenericExtension|get#tearOffs::T% = dynamic>(S%) → dynamic
+  return <S extends self::GenericExtension|get#tearOffs::T% = dynamic>(S% value) → dynamic => self::GenericExtension|tearOffs<self::GenericExtension|get#tearOffs::T%, S%>(#this, value);
+static method GenericExtension|getterCalls<T extends core::Object? = dynamic, S extends self::GenericExtension|getterCalls::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|getterCalls::T%> #this, self::GenericExtension|getterCalls::S% value) → dynamic {
+  self::GenericExtension|get#tearOffGetterNoArgs<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call();
+  self::GenericExtension|get#tearOffGetterRequired<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call(value);
+  self::GenericExtension|get#tearOffGetterOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call();
+  self::GenericExtension|get#tearOffGetterOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call(value);
+  self::GenericExtension|get#tearOffGetterNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call();
+  self::GenericExtension|get#tearOffGetterNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call(value: value);
+  self::GenericExtension|get#tearOffGetterGenericRequired<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call(value);
+  self::GenericExtension|get#tearOffGetterGenericRequired<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::T%>(value);
+  self::GenericExtension|get#tearOffGetterGenericRequired<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::S%>(value);
+  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call();
+  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::T%>();
+  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::S%>();
+  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call(value);
+  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::T%>(value);
+  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::S%>(value);
+  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call();
+  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::T%>();
+  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::S%>();
+  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call(value: value);
+  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::T%>(value: value);
+  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::S%>(value: value);
 }
-static method GenericExtension|get#getterCalls<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#getterCalls::T*>* #this) → <S extends self::GenericExtension|get#getterCalls::T* = dynamic>(S*) →* dynamic
-  return <S extends self::GenericExtension|get#getterCalls::T* = dynamic>(S* value) → dynamic => self::GenericExtension|getterCalls<self::GenericExtension|get#getterCalls::T*, S*>(#this, value);
+static method GenericExtension|get#getterCalls<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#getterCalls::T%> #this) → <S extends self::GenericExtension|get#getterCalls::T% = dynamic>(S%) → dynamic
+  return <S extends self::GenericExtension|get#getterCalls::T% = dynamic>(S% value) → dynamic => self::GenericExtension|getterCalls<self::GenericExtension|get#getterCalls::T%, S%>(#this, value);
 static method main() → dynamic {}
 
 constants  {

pkg/front_end/testcases/extensions/direct_instance_access.dart.weak.outline.expect

@@ -1,38 +1,18 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 class Class extends core::Object {
   field dynamic field;
-  synthetic constructor •() → self::Class*
+  synthetic constructor •() → self::Class
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-class GenericClass<T extends core::Object* = dynamic> extends core::Object {
-  covariant-by-class field self::GenericClass::T* field;
-  synthetic constructor •() → self::GenericClass<self::GenericClass::T*>*
+class GenericClass<T extends core::Object? = dynamic> extends core::Object {
+  covariant-by-class field self::GenericClass::T? field;
+  synthetic constructor •() → self::GenericClass<self::GenericClass::T%>
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension Extension on self::Class* {
+extension Extension on self::Class {
   method readGetter = self::Extension|readGetter;
   tearoff readGetter = self::Extension|get#readGetter;
   method writeSetterRequired = self::Extension|writeSetterRequired;
@@ -54,7 +34,7 @@ extension Extension on self::Class* {
   tearoff getterCalls = self::Extension|get#getterCalls;
   set property = self::Extension|set#property;
 }
-extension GenericExtension<T extends core::Object* = dynamic> on self::GenericClass<T*>* {
+extension GenericExtension<T extends core::Object? = dynamic> on self::GenericClass<T%> {
   method readGetter = self::GenericExtension|readGetter;
   tearoff readGetter = self::GenericExtension|get#readGetter;
   method writeSetterRequired = self::GenericExtension|writeSetterRequired;
@@ -85,103 +65,103 @@ extension GenericExtension<T extends core::Object* = dynamic> on self::GenericCl
   tearoff getterCalls = self::GenericExtension|get#getterCalls;
   set property = self::GenericExtension|set#property;
 }
-static method Extension|get#readGetter(lowered final self::Class* #this) → () →* dynamic
+static method Extension|get#readGetter(lowered final self::Class #this) → () → dynamic
   return () → dynamic => self::Extension|readGetter(#this);
-static method Extension|readGetter(lowered final self::Class* #this) → dynamic
+static method Extension|readGetter(lowered final self::Class #this) → dynamic
   ;
-static method Extension|writeSetterRequired(lowered final self::Class* #this, dynamic value) → dynamic
+static method Extension|writeSetterRequired(lowered final self::Class #this, dynamic value) → dynamic
   ;
-static method Extension|get#writeSetterRequired(lowered final self::Class* #this) → (dynamic) →* dynamic
+static method Extension|get#writeSetterRequired(lowered final self::Class #this) → (dynamic) → dynamic
   return (dynamic value) → dynamic => self::Extension|writeSetterRequired(#this, value);
-static method Extension|writeSetterOptional(lowered final self::Class* #this, [dynamic value]) → dynamic
+static method Extension|writeSetterOptional(lowered final self::Class #this, [dynamic value]) → dynamic
   ;
-static method Extension|get#writeSetterOptional(lowered final self::Class* #this) → ([dynamic]) →* dynamic
+static method Extension|get#writeSetterOptional(lowered final self::Class #this) → ([dynamic]) → dynamic
   return ([dynamic value]) → dynamic => self::Extension|writeSetterOptional(#this, value);
-static method Extension|writeSetterNamed(lowered final self::Class* #this, {dynamic value}) → dynamic
+static method Extension|writeSetterNamed(lowered final self::Class #this, {dynamic value}) → dynamic
   ;
-static method Extension|get#writeSetterNamed(lowered final self::Class* #this) → ({value: dynamic}) →* dynamic
+static method Extension|get#writeSetterNamed(lowered final self::Class #this) → ({value: dynamic}) → dynamic
   return ({dynamic value}) → dynamic => self::Extension|writeSetterNamed(#this, value: value);
-static method Extension|get#tearOffGetterNoArgs(lowered final self::Class* #this) → dynamic
+static method Extension|get#tearOffGetterNoArgs(lowered final self::Class #this) → dynamic
   ;
-static method Extension|get#tearOffGetterRequired(lowered final self::Class* #this) → dynamic
+static method Extension|get#tearOffGetterRequired(lowered final self::Class #this) → dynamic
   ;
-static method Extension|get#tearOffGetterOptional(lowered final self::Class* #this) → dynamic
+static method Extension|get#tearOffGetterOptional(lowered final self::Class #this) → dynamic
   ;
-static method Extension|get#tearOffGetterNamed(lowered final self::Class* #this) → dynamic
+static method Extension|get#tearOffGetterNamed(lowered final self::Class #this) → dynamic
   ;
-static method Extension|get#property(lowered final self::Class* #this) → dynamic
+static method Extension|get#property(lowered final self::Class #this) → dynamic
   ;
-static method Extension|set#property(lowered final self::Class* #this, dynamic value) → void
+static method Extension|set#property(lowered final self::Class #this, dynamic value) → void
   ;
-static method Extension|invocations(lowered final self::Class* #this, dynamic value) → dynamic
+static method Extension|invocations(lowered final self::Class #this, dynamic value) → dynamic
   ;
-static method Extension|get#invocations(lowered final self::Class* #this) → (dynamic) →* dynamic
+static method Extension|get#invocations(lowered final self::Class #this) → (dynamic) → dynamic
   return (dynamic value) → dynamic => self::Extension|invocations(#this, value);
-static method Extension|get#tearOffs(lowered final self::Class* #this) → (dynamic) →* dynamic
+static method Extension|get#tearOffs(lowered final self::Class #this) → (dynamic) → dynamic
   return (dynamic value) → dynamic => self::Extension|tearOffs(#this, value);
-static method Extension|tearOffs(lowered final self::Class* #this, dynamic value) → dynamic
+static method Extension|tearOffs(lowered final self::Class #this, dynamic value) → dynamic
   ;
-static method Extension|getterCalls(lowered final self::Class* #this, dynamic value) → dynamic
+static method Extension|getterCalls(lowered final self::Class #this, dynamic value) → dynamic
   ;
-static method Extension|get#getterCalls(lowered final self::Class* #this) → (dynamic) →* dynamic
+static method Extension|get#getterCalls(lowered final self::Class #this) → (dynamic) → dynamic
   return (dynamic value) → dynamic => self::Extension|getterCalls(#this, value);
-static method GenericExtension|readGetter<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|readGetter::T*>* #this) → self::GenericExtension|readGetter::T*
+static method GenericExtension|readGetter<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|readGetter::T%> #this) → self::GenericExtension|readGetter::T?
   ;
-static method GenericExtension|get#readGetter<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#readGetter::T*>* #this) → () →* self::GenericExtension|get#readGetter::T*
-  return () → self::GenericExtension|get#readGetter::T* => self::GenericExtension|readGetter<self::GenericExtension|get#readGetter::T*>(#this);
-static method GenericExtension|writeSetterRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterRequired::T*>* #this, self::GenericExtension|writeSetterRequired::T* value) → dynamic
+static method GenericExtension|get#readGetter<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#readGetter::T%> #this) → () → self::GenericExtension|get#readGetter::T?
+  return () → self::GenericExtension|get#readGetter::T? => self::GenericExtension|readGetter<self::GenericExtension|get#readGetter::T%>(#this);
+static method GenericExtension|writeSetterRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterRequired::T%> #this, self::GenericExtension|writeSetterRequired::T% value) → dynamic
   ;
-static method GenericExtension|get#writeSetterRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterRequired::T*>* #this) → (self::GenericExtension|get#writeSetterRequired::T*) →* dynamic
-  return (self::GenericExtension|get#writeSetterRequired::T* value) → dynamic => self::GenericExtension|writeSetterRequired<self::GenericExtension|get#writeSetterRequired::T*>(#this, value);
-static method GenericExtension|writeSetterOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterOptional::T*>* #this, [self::GenericExtension|writeSetterOptional::T* value]) → dynamic
+static method GenericExtension|get#writeSetterRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterRequired::T%> #this) → (self::GenericExtension|get#writeSetterRequired::T%) → dynamic
+  return (self::GenericExtension|get#writeSetterRequired::T% value) → dynamic => self::GenericExtension|writeSetterRequired<self::GenericExtension|get#writeSetterRequired::T%>(#this, value);
+static method GenericExtension|writeSetterOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterOptional::T%> #this, [self::GenericExtension|writeSetterOptional::T? value]) → dynamic
   ;
-static method GenericExtension|get#writeSetterOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterOptional::T*>* #this) → ([self::GenericExtension|get#writeSetterOptional::T*]) →* dynamic
-  return ([self::GenericExtension|get#writeSetterOptional::T* value]) → dynamic => self::GenericExtension|writeSetterOptional<self::GenericExtension|get#writeSetterOptional::T*>(#this, value);
-static method GenericExtension|writeSetterNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterNamed::T*>* #this, {self::GenericExtension|writeSetterNamed::T* value}) → dynamic
+static method GenericExtension|get#writeSetterOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterOptional::T%> #this) → ([self::GenericExtension|get#writeSetterOptional::T?]) → dynamic
+  return ([self::GenericExtension|get#writeSetterOptional::T? value]) → dynamic => self::GenericExtension|writeSetterOptional<self::GenericExtension|get#writeSetterOptional::T%>(#this, value);
+static method GenericExtension|writeSetterNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterNamed::T%> #this, {self::GenericExtension|writeSetterNamed::T? value}) → dynamic
   ;
-static method GenericExtension|get#writeSetterNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterNamed::T*>* #this) → ({value: self::GenericExtension|get#writeSetterNamed::T*}) →* dynamic
-  return ({self::GenericExtension|get#writeSetterNamed::T* value}) → dynamic => self::GenericExtension|writeSetterNamed<self::GenericExtension|get#writeSetterNamed::T*>(#this, value: value);
-static method GenericExtension|genericWriteSetterRequired<T extends core::Object* = dynamic, S extends self::GenericExtension|genericWriteSetterRequired::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterRequired::T*>* #this, self::GenericExtension|genericWriteSetterRequired::S* value) → dynamic
+static method GenericExtension|get#writeSetterNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterNamed::T%> #this) → ({value: self::GenericExtension|get#writeSetterNamed::T?}) → dynamic
+  return ({self::GenericExtension|get#writeSetterNamed::T? value}) → dynamic => self::GenericExtension|writeSetterNamed<self::GenericExtension|get#writeSetterNamed::T%>(#this, value: value);
+static method GenericExtension|genericWriteSetterRequired<T extends core::Object? = dynamic, S extends self::GenericExtension|genericWriteSetterRequired::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterRequired::T%> #this, self::GenericExtension|genericWriteSetterRequired::S% value) → dynamic
   ;
-static method GenericExtension|get#genericWriteSetterRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterRequired::T*>* #this) → <S extends self::GenericExtension|get#genericWriteSetterRequired::T* = dynamic>(S*) →* dynamic
-  return <S extends self::GenericExtension|get#genericWriteSetterRequired::T* = dynamic>(S* value) → dynamic => self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|get#genericWriteSetterRequired::T*, S*>(#this, value);
-static method GenericExtension|genericWriteSetterOptional<T extends core::Object* = dynamic, S extends self::GenericExtension|genericWriteSetterOptional::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterOptional::T*>* #this, [self::GenericExtension|genericWriteSetterOptional::S* value]) → dynamic
+static method GenericExtension|get#genericWriteSetterRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterRequired::T%> #this) → <S extends self::GenericExtension|get#genericWriteSetterRequired::T% = dynamic>(S%) → dynamic
+  return <S extends self::GenericExtension|get#genericWriteSetterRequired::T% = dynamic>(S% value) → dynamic => self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|get#genericWriteSetterRequired::T%, S%>(#this, value);
+static method GenericExtension|genericWriteSetterOptional<T extends core::Object? = dynamic, S extends self::GenericExtension|genericWriteSetterOptional::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterOptional::T%> #this, [self::GenericExtension|genericWriteSetterOptional::S? value]) → dynamic
   ;
-static method GenericExtension|get#genericWriteSetterOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterOptional::T*>* #this) → <S extends self::GenericExtension|get#genericWriteSetterOptional::T* = dynamic>([S*]) →* dynamic
-  return <S extends self::GenericExtension|get#genericWriteSetterOptional::T* = dynamic>([S* value]) → dynamic => self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|get#genericWriteSetterOptional::T*, S*>(#this, value);
-static method GenericExtension|get#genericWriteSetterNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterNamed::T*>* #this) → <S extends self::GenericExtension|get#genericWriteSetterNamed::T* = dynamic>({value: S*}) →* dynamic
-  return <S extends self::GenericExtension|get#genericWriteSetterNamed::T* = dynamic>({S* value}) → dynamic => self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|get#genericWriteSetterNamed::T*, S*>(#this, value: value);
-static method GenericExtension|genericWriteSetterNamed<T extends core::Object* = dynamic, S extends self::GenericExtension|genericWriteSetterNamed::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterNamed::T*>* #this, {self::GenericExtension|genericWriteSetterNamed::S* value}) → dynamic
+static method GenericExtension|get#genericWriteSetterOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterOptional::T%> #this) → <S extends self::GenericExtension|get#genericWriteSetterOptional::T% = dynamic>([S?]) → dynamic
+  return <S extends self::GenericExtension|get#genericWriteSetterOptional::T% = dynamic>([S? value]) → dynamic => self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|get#genericWriteSetterOptional::T%, S%>(#this, value);
+static method GenericExtension|get#genericWriteSetterNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterNamed::T%> #this) → <S extends self::GenericExtension|get#genericWriteSetterNamed::T% = dynamic>({value: S?}) → dynamic
+  return <S extends self::GenericExtension|get#genericWriteSetterNamed::T% = dynamic>({S? value}) → dynamic => self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|get#genericWriteSetterNamed::T%, S%>(#this, value: value);
+static method GenericExtension|genericWriteSetterNamed<T extends core::Object? = dynamic, S extends self::GenericExtension|genericWriteSetterNamed::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterNamed::T%> #this, {self::GenericExtension|genericWriteSetterNamed::S? value}) → dynamic
   ;
-static method GenericExtension|get#property<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#property::T*>* #this) → self::GenericExtension|get#property::T*
+static method GenericExtension|get#property<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#property::T%> #this) → self::GenericExtension|get#property::T?
   ;
-static method GenericExtension|set#property<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|set#property::T*>* #this, self::GenericExtension|set#property::T* value) → void
+static method GenericExtension|set#property<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|set#property::T%> #this, self::GenericExtension|set#property::T? value) → void
   ;
-static method GenericExtension|get#tearOffGetterNoArgs<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterNoArgs::T*>* #this) → dynamic
+static method GenericExtension|get#tearOffGetterNoArgs<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterNoArgs::T%> #this) → dynamic
   ;
-static method GenericExtension|get#tearOffGetterRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterRequired::T*>* #this) → dynamic
+static method GenericExtension|get#tearOffGetterRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterRequired::T%> #this) → dynamic
   ;
-static method GenericExtension|get#tearOffGetterOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterOptional::T*>* #this) → dynamic
+static method GenericExtension|get#tearOffGetterOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterOptional::T%> #this) → dynamic
   ;
-static method GenericExtension|get#tearOffGetterNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterNamed::T*>* #this) → dynamic
+static method GenericExtension|get#tearOffGetterNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterNamed::T%> #this) → dynamic
   ;
-static method GenericExtension|get#tearOffGetterGenericRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericRequired::T*>* #this) → dynamic
+static method GenericExtension|get#tearOffGetterGenericRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericRequired::T%> #this) → dynamic
   ;
-static method GenericExtension|get#tearOffGetterGenericOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericOptional::T*>* #this) → dynamic
+static method GenericExtension|get#tearOffGetterGenericOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericOptional::T%> #this) → dynamic
   ;
-static method GenericExtension|get#tearOffGetterGenericNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericNamed::T*>* #this) → dynamic
+static method GenericExtension|get#tearOffGetterGenericNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericNamed::T%> #this) → dynamic
   ;
-static method GenericExtension|invocations<T extends core::Object* = dynamic, S extends self::GenericExtension|invocations::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|invocations::T*>* #this, self::GenericExtension|invocations::S* value) → dynamic
+static method GenericExtension|invocations<T extends core::Object? = dynamic, S extends self::GenericExtension|invocations::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|invocations::T%> #this, self::GenericExtension|invocations::S% value) → dynamic
   ;
-static method GenericExtension|get#invocations<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#invocations::T*>* #this) → <S extends self::GenericExtension|get#invocations::T* = dynamic>(S*) →* dynamic
-  return <S extends self::GenericExtension|get#invocations::T* = dynamic>(S* value) → dynamic => self::GenericExtension|invocations<self::GenericExtension|get#invocations::T*, S*>(#this, value);
-static method GenericExtension|tearOffs<T extends core::Object* = dynamic, S extends self::GenericExtension|tearOffs::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|tearOffs::T*>* #this, self::GenericExtension|tearOffs::S* value) → dynamic
+static method GenericExtension|get#invocations<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#invocations::T%> #this) → <S extends self::GenericExtension|get#invocations::T% = dynamic>(S%) → dynamic
+  return <S extends self::GenericExtension|get#invocations::T% = dynamic>(S% value) → dynamic => self::GenericExtension|invocations<self::GenericExtension|get#invocations::T%, S%>(#this, value);
+static method GenericExtension|tearOffs<T extends core::Object? = dynamic, S extends self::GenericExtension|tearOffs::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|tearOffs::T%> #this, self::GenericExtension|tearOffs::S% value) → dynamic
   ;
-static method GenericExtension|get#tearOffs<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffs::T*>* #this) → <S extends self::GenericExtension|get#tearOffs::T* = dynamic>(S*) →* dynamic
-  return <S extends self::GenericExtension|get#tearOffs::T* = dynamic>(S* value) → dynamic => self::GenericExtension|tearOffs<self::GenericExtension|get#tearOffs::T*, S*>(#this, value);
-static method GenericExtension|getterCalls<T extends core::Object* = dynamic, S extends self::GenericExtension|getterCalls::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|getterCalls::T*>* #this, self::GenericExtension|getterCalls::S* value) → dynamic
+static method GenericExtension|get#tearOffs<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffs::T%> #this) → <S extends self::GenericExtension|get#tearOffs::T% = dynamic>(S%) → dynamic
+  return <S extends self::GenericExtension|get#tearOffs::T% = dynamic>(S% value) → dynamic => self::GenericExtension|tearOffs<self::GenericExtension|get#tearOffs::T%, S%>(#this, value);
+static method GenericExtension|getterCalls<T extends core::Object? = dynamic, S extends self::GenericExtension|getterCalls::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|getterCalls::T%> #this, self::GenericExtension|getterCalls::S% value) → dynamic
   ;
-static method GenericExtension|get#getterCalls<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#getterCalls::T*>* #this) → <S extends self::GenericExtension|get#getterCalls::T* = dynamic>(S*) →* dynamic
-  return <S extends self::GenericExtension|get#getterCalls::T* = dynamic>(S* value) → dynamic => self::GenericExtension|getterCalls<self::GenericExtension|get#getterCalls::T*, S*>(#this, value);
+static method GenericExtension|get#getterCalls<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#getterCalls::T%> #this) → <S extends self::GenericExtension|get#getterCalls::T% = dynamic>(S%) → dynamic
+  return <S extends self::GenericExtension|get#getterCalls::T% = dynamic>(S% value) → dynamic => self::GenericExtension|getterCalls<self::GenericExtension|get#getterCalls::T%, S%>(#this, value);
 static method main() → dynamic
   ;

pkg/front_end/testcases/extensions/direct_instance_access.dart.weak.transformed.expect

@@ -1,40 +1,20 @@
-library;
+library /*isNonNullableByDefault*/;
 import self as self;
 import "dart:core" as core;
 
 class Class extends core::Object {
   field dynamic field = null;
-  synthetic constructor •() → self::Class*
+  synthetic constructor •() → self::Class
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-class GenericClass<T extends core::Object* = dynamic> extends core::Object {
-  covariant-by-class field self::GenericClass::T* field = null;
-  synthetic constructor •() → self::GenericClass<self::GenericClass::T*>*
+class GenericClass<T extends core::Object? = dynamic> extends core::Object {
+  covariant-by-class field self::GenericClass::T? field = null;
+  synthetic constructor •() → self::GenericClass<self::GenericClass::T%>
     : super core::Object::•()
     ;
-  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
-  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
-  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
-  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
-  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
-  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
-  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
-  abstract member-signature method toString() → core::String*; -> core::Object::toString
-  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
-  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
 }
-extension Extension on self::Class* {
+extension Extension on self::Class {
   method readGetter = self::Extension|readGetter;
   tearoff readGetter = self::Extension|get#readGetter;
   method writeSetterRequired = self::Extension|writeSetterRequired;
@@ -56,7 +36,7 @@ extension Extension on self::Class* {
   tearoff getterCalls = self::Extension|get#getterCalls;
   set property = self::Extension|set#property;
 }
-extension GenericExtension<T extends core::Object* = dynamic> on self::GenericClass<T*>* {
+extension GenericExtension<T extends core::Object? = dynamic> on self::GenericClass<T%> {
   method readGetter = self::GenericExtension|readGetter;
   tearoff readGetter = self::GenericExtension|get#readGetter;
   method writeSetterRequired = self::GenericExtension|writeSetterRequired;
@@ -87,40 +67,40 @@ extension GenericExtension<T extends core::Object* = dynamic> on self::GenericCl
   tearoff getterCalls = self::GenericExtension|get#getterCalls;
   set property = self::GenericExtension|set#property;
 }
-static method Extension|get#readGetter(lowered final self::Class* #this) → () →* dynamic
+static method Extension|get#readGetter(lowered final self::Class #this) → () → dynamic
   return () → dynamic => self::Extension|readGetter(#this);
-static method Extension|readGetter(lowered final self::Class* #this) → dynamic {
+static method Extension|readGetter(lowered final self::Class #this) → dynamic {
   return self::Extension|get#property(#this);
 }
-static method Extension|writeSetterRequired(lowered final self::Class* #this, dynamic value) → dynamic {
+static method Extension|writeSetterRequired(lowered final self::Class #this, dynamic value) → dynamic {
   self::Extension|set#property(#this, value);
 }
-static method Extension|get#writeSetterRequired(lowered final self::Class* #this) → (dynamic) →* dynamic
+static method Extension|get#writeSetterRequired(lowered final self::Class #this) → (dynamic) → dynamic
   return (dynamic value) → dynamic => self::Extension|writeSetterRequired(#this, value);
-static method Extension|writeSetterOptional(lowered final self::Class* #this, [dynamic value = #C1]) → dynamic {
+static method Extension|writeSetterOptional(lowered final self::Class #this, [dynamic value = #C1]) → dynamic {
   self::Extension|set#property(#this, value);
 }
-static method Extension|get#writeSetterOptional(lowered final self::Class* #this) → ([dynamic]) →* dynamic
+static method Extension|get#writeSetterOptional(lowered final self::Class #this) → ([dynamic]) → dynamic
   return ([dynamic value = #C1]) → dynamic => self::Extension|writeSetterOptional(#this, value);
-static method Extension|writeSetterNamed(lowered final self::Class* #this, {dynamic value = #C1}) → dynamic {
+static method Extension|writeSetterNamed(lowered final self::Class #this, {dynamic value = #C1}) → dynamic {
   self::Extension|set#property(#this, value);
 }
-static method Extension|get#writeSetterNamed(lowered final self::Class* #this) → ({value: dynamic}) →* dynamic
+static method Extension|get#writeSetterNamed(lowered final self::Class #this) → ({value: dynamic}) → dynamic
   return ({dynamic value = #C1}) → dynamic => self::Extension|writeSetterNamed(#this, value: value);
-static method Extension|get#tearOffGetterNoArgs(lowered final self::Class* #this) → dynamic
+static method Extension|get#tearOffGetterNoArgs(lowered final self::Class #this) → dynamic
   return self::Extension|get#readGetter(#this);
-static method Extension|get#tearOffGetterRequired(lowered final self::Class* #this) → dynamic
+static method Extension|get#tearOffGetterRequired(lowered final self::Class #this) → dynamic
   return self::Extension|get#writeSetterRequired(#this);
-static method Extension|get#tearOffGetterOptional(lowered final self::Class* #this) → dynamic
+static method Extension|get#tearOffGetterOptional(lowered final self::Class #this) → dynamic
   return self::Extension|get#writeSetterOptional(#this);
-static method Extension|get#tearOffGetterNamed(lowered final self::Class* #this) → dynamic
+static method Extension|get#tearOffGetterNamed(lowered final self::Class #this) → dynamic
   return self::Extension|get#writeSetterNamed(#this);
-static method Extension|get#property(lowered final self::Class* #this) → dynamic
+static method Extension|get#property(lowered final self::Class #this) → dynamic
   return #this.{self::Class::field}{dynamic};
-static method Extension|set#property(lowered final self::Class* #this, dynamic value) → void {
+static method Extension|set#property(lowered final self::Class #this, dynamic value) → void {
   #this.{self::Class::field} = value;
 }
-static method Extension|invocations(lowered final self::Class* #this, dynamic value) → dynamic {
+static method Extension|invocations(lowered final self::Class #this, dynamic value) → dynamic {
   self::Extension|readGetter(#this);
   self::Extension|writeSetterRequired(#this, value);
   self::Extension|writeSetterOptional(#this);
@@ -128,23 +108,23 @@ static method Extension|invocations(lowered final self::Class* #this, dynamic va
   self::Extension|writeSetterNamed(#this);
   self::Extension|writeSetterNamed(#this, value: value);
 }
-static method Extension|get#invocations(lowered final self::Class* #this) → (dynamic) →* dynamic
+static method Extension|get#invocations(lowered final self::Class #this) → (dynamic) → dynamic
   return (dynamic value) → dynamic => self::Extension|invocations(#this, value);
-static method Extension|get#tearOffs(lowered final self::Class* #this) → (dynamic) →* dynamic
+static method Extension|get#tearOffs(lowered final self::Class #this) → (dynamic) → dynamic
   return (dynamic value) → dynamic => self::Extension|tearOffs(#this, value);
-static method Extension|tearOffs(lowered final self::Class* #this, dynamic value) → dynamic {
-  () →* dynamic tearOffNoArgs = self::Extension|get#readGetter(#this);
-  tearOffNoArgs(){() →* dynamic};
-  (dynamic) →* dynamic tearOffRequired = self::Extension|get#writeSetterRequired(#this);
-  tearOffRequired(value){(dynamic) →* dynamic};
-  ([dynamic]) →* dynamic tearOffOptional = self::Extension|get#writeSetterOptional(#this);
-  tearOffOptional(){([dynamic]) →* dynamic};
-  tearOffOptional(value){([dynamic]) →* dynamic};
-  ({value: dynamic}) →* dynamic tearOffNamed = self::Extension|get#writeSetterNamed(#this);
-  tearOffNamed(){({value: dynamic}) →* dynamic};
-  tearOffNamed(value: value){({value: dynamic}) →* dynamic};
+static method Extension|tearOffs(lowered final self::Class #this, dynamic value) → dynamic {
+  () → dynamic tearOffNoArgs = self::Extension|get#readGetter(#this);
+  tearOffNoArgs(){() → dynamic};
+  (dynamic) → dynamic tearOffRequired = self::Extension|get#writeSetterRequired(#this);
+  tearOffRequired(value){(dynamic) → dynamic};
+  ([dynamic]) → dynamic tearOffOptional = self::Extension|get#writeSetterOptional(#this);
+  tearOffOptional(){([dynamic]) → dynamic};
+  tearOffOptional(value){([dynamic]) → dynamic};
+  ({value: dynamic}) → dynamic tearOffNamed = self::Extension|get#writeSetterNamed(#this);
+  tearOffNamed(){({value: dynamic}) → dynamic};
+  tearOffNamed(value: value){({value: dynamic}) → dynamic};
 }
-static method Extension|getterCalls(lowered final self::Class* #this, dynamic value) → dynamic {
+static method Extension|getterCalls(lowered final self::Class #this, dynamic value) → dynamic {
   self::Extension|get#tearOffGetterNoArgs(#this){dynamic}.call();
   self::Extension|get#tearOffGetterRequired(#this){dynamic}.call(value);
   self::Extension|get#tearOffGetterOptional(#this){dynamic}.call();
@@ -152,144 +132,144 @@ static method Extension|getterCalls(lowered final self::Class* #this, dynamic va
   self::Extension|get#tearOffGetterNamed(#this){dynamic}.call();
   self::Extension|get#tearOffGetterNamed(#this){dynamic}.call(value: value);
 }
-static method Extension|get#getterCalls(lowered final self::Class* #this) → (dynamic) →* dynamic
+static method Extension|get#getterCalls(lowered final self::Class #this) → (dynamic) → dynamic
   return (dynamic value) → dynamic => self::Extension|getterCalls(#this, value);
-static method GenericExtension|readGetter<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|readGetter::T*>* #this) → self::GenericExtension|readGetter::T* {
-  return self::GenericExtension|get#property<self::GenericExtension|readGetter::T*>(#this);
+static method GenericExtension|readGetter<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|readGetter::T%> #this) → self::GenericExtension|readGetter::T? {
+  return self::GenericExtension|get#property<self::GenericExtension|readGetter::T%>(#this);
 }
-static method GenericExtension|get#readGetter<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#readGetter::T*>* #this) → () →* self::GenericExtension|get#readGetter::T*
-  return () → self::GenericExtension|get#readGetter::T* => self::GenericExtension|readGetter<self::GenericExtension|get#readGetter::T*>(#this);
-static method GenericExtension|writeSetterRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterRequired::T*>* #this, self::GenericExtension|writeSetterRequired::T* value) → dynamic {
-  self::GenericExtension|set#property<self::GenericExtension|writeSetterRequired::T*>(#this, value);
+static method GenericExtension|get#readGetter<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#readGetter::T%> #this) → () → self::GenericExtension|get#readGetter::T?
+  return () → self::GenericExtension|get#readGetter::T? => self::GenericExtension|readGetter<self::GenericExtension|get#readGetter::T%>(#this);
+static method GenericExtension|writeSetterRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterRequired::T%> #this, self::GenericExtension|writeSetterRequired::T% value) → dynamic {
+  self::GenericExtension|set#property<self::GenericExtension|writeSetterRequired::T%>(#this, value);
 }
-static method GenericExtension|get#writeSetterRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterRequired::T*>* #this) → (self::GenericExtension|get#writeSetterRequired::T*) →* dynamic
-  return (self::GenericExtension|get#writeSetterRequired::T* value) → dynamic => self::GenericExtension|writeSetterRequired<self::GenericExtension|get#writeSetterRequired::T*>(#this, value);
-static method GenericExtension|writeSetterOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterOptional::T*>* #this, [self::GenericExtension|writeSetterOptional::T* value = #C1]) → dynamic {
-  self::GenericExtension|set#property<self::GenericExtension|writeSetterOptional::T*>(#this, value);
+static method GenericExtension|get#writeSetterRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterRequired::T%> #this) → (self::GenericExtension|get#writeSetterRequired::T%) → dynamic
+  return (self::GenericExtension|get#writeSetterRequired::T% value) → dynamic => self::GenericExtension|writeSetterRequired<self::GenericExtension|get#writeSetterRequired::T%>(#this, value);
+static method GenericExtension|writeSetterOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterOptional::T%> #this, [self::GenericExtension|writeSetterOptional::T? value = #C1]) → dynamic {
+  self::GenericExtension|set#property<self::GenericExtension|writeSetterOptional::T%>(#this, value);
 }
-static method GenericExtension|get#writeSetterOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterOptional::T*>* #this) → ([self::GenericExtension|get#writeSetterOptional::T*]) →* dynamic
-  return ([self::GenericExtension|get#writeSetterOptional::T* value = #C1]) → dynamic => self::GenericExtension|writeSetterOptional<self::GenericExtension|get#writeSetterOptional::T*>(#this, value);
-static method GenericExtension|writeSetterNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterNamed::T*>* #this, {self::GenericExtension|writeSetterNamed::T* value = #C1}) → dynamic {
-  self::GenericExtension|set#property<self::GenericExtension|writeSetterNamed::T*>(#this, value);
+static method GenericExtension|get#writeSetterOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterOptional::T%> #this) → ([self::GenericExtension|get#writeSetterOptional::T?]) → dynamic
+  return ([self::GenericExtension|get#writeSetterOptional::T? value = #C1]) → dynamic => self::GenericExtension|writeSetterOptional<self::GenericExtension|get#writeSetterOptional::T%>(#this, value);
+static method GenericExtension|writeSetterNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|writeSetterNamed::T%> #this, {self::GenericExtension|writeSetterNamed::T? value = #C1}) → dynamic {
+  self::GenericExtension|set#property<self::GenericExtension|writeSetterNamed::T%>(#this, value);
 }
-static method GenericExtension|get#writeSetterNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterNamed::T*>* #this) → ({value: self::GenericExtension|get#writeSetterNamed::T*}) →* dynamic
-  return ({self::GenericExtension|get#writeSetterNamed::T* value = #C1}) → dynamic => self::GenericExtension|writeSetterNamed<self::GenericExtension|get#writeSetterNamed::T*>(#this, value: value);
-static method GenericExtension|genericWriteSetterRequired<T extends core::Object* = dynamic, S extends self::GenericExtension|genericWriteSetterRequired::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterRequired::T*>* #this, self::GenericExtension|genericWriteSetterRequired::S* value) → dynamic {
-  self::GenericExtension|set#property<self::GenericExtension|genericWriteSetterRequired::T*>(#this, value);
+static method GenericExtension|get#writeSetterNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#writeSetterNamed::T%> #this) → ({value: self::GenericExtension|get#writeSetterNamed::T?}) → dynamic
+  return ({self::GenericExtension|get#writeSetterNamed::T? value = #C1}) → dynamic => self::GenericExtension|writeSetterNamed<self::GenericExtension|get#writeSetterNamed::T%>(#this, value: value);
+static method GenericExtension|genericWriteSetterRequired<T extends core::Object? = dynamic, S extends self::GenericExtension|genericWriteSetterRequired::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterRequired::T%> #this, self::GenericExtension|genericWriteSetterRequired::S% value) → dynamic {
+  self::GenericExtension|set#property<self::GenericExtension|genericWriteSetterRequired::T%>(#this, value);
 }
-static method GenericExtension|get#genericWriteSetterRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterRequired::T*>* #this) → <S extends self::GenericExtension|get#genericWriteSetterRequired::T* = dynamic>(S*) →* dynamic
-  return <S extends self::GenericExtension|get#genericWriteSetterRequired::T* = dynamic>(S* value) → dynamic => self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|get#genericWriteSetterRequired::T*, S*>(#this, value);
-static method GenericExtension|genericWriteSetterOptional<T extends core::Object* = dynamic, S extends self::GenericExtension|genericWriteSetterOptional::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterOptional::T*>* #this, [self::GenericExtension|genericWriteSetterOptional::S* value = #C1]) → dynamic {
-  self::GenericExtension|set#property<self::GenericExtension|genericWriteSetterOptional::T*>(#this, value);
+static method GenericExtension|get#genericWriteSetterRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterRequired::T%> #this) → <S extends self::GenericExtension|get#genericWriteSetterRequired::T% = dynamic>(S%) → dynamic
+  return <S extends self::GenericExtension|get#genericWriteSetterRequired::T% = dynamic>(S% value) → dynamic => self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|get#genericWriteSetterRequired::T%, S%>(#this, value);
+static method GenericExtension|genericWriteSetterOptional<T extends core::Object? = dynamic, S extends self::GenericExtension|genericWriteSetterOptional::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterOptional::T%> #this, [self::GenericExtension|genericWriteSetterOptional::S? value = #C1]) → dynamic {
+  self::GenericExtension|set#property<self::GenericExtension|genericWriteSetterOptional::T%>(#this, value);
 }
-static method GenericExtension|get#genericWriteSetterOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterOptional::T*>* #this) → <S extends self::GenericExtension|get#genericWriteSetterOptional::T* = dynamic>([S*]) →* dynamic
-  return <S extends self::GenericExtension|get#genericWriteSetterOptional::T* = dynamic>([S* value = #C1]) → dynamic => self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|get#genericWriteSetterOptional::T*, S*>(#this, value);
-static method GenericExtension|get#genericWriteSetterNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterNamed::T*>* #this) → <S extends self::GenericExtension|get#genericWriteSetterNamed::T* = dynamic>({value: S*}) →* dynamic
-  return <S extends self::GenericExtension|get#genericWriteSetterNamed::T* = dynamic>({S* value = #C1}) → dynamic => self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|get#genericWriteSetterNamed::T*, S*>(#this, value: value);
-static method GenericExtension|genericWriteSetterNamed<T extends core::Object* = dynamic, S extends self::GenericExtension|genericWriteSetterNamed::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterNamed::T*>* #this, {self::GenericExtension|genericWriteSetterNamed::S* value = #C1}) → dynamic {
-  self::GenericExtension|set#property<self::GenericExtension|genericWriteSetterNamed::T*>(#this, value);
+static method GenericExtension|get#genericWriteSetterOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterOptional::T%> #this) → <S extends self::GenericExtension|get#genericWriteSetterOptional::T% = dynamic>([S?]) → dynamic
+  return <S extends self::GenericExtension|get#genericWriteSetterOptional::T% = dynamic>([S? value = #C1]) → dynamic => self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|get#genericWriteSetterOptional::T%, S%>(#this, value);
+static method GenericExtension|get#genericWriteSetterNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#genericWriteSetterNamed::T%> #this) → <S extends self::GenericExtension|get#genericWriteSetterNamed::T% = dynamic>({value: S?}) → dynamic
+  return <S extends self::GenericExtension|get#genericWriteSetterNamed::T% = dynamic>({S? value = #C1}) → dynamic => self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|get#genericWriteSetterNamed::T%, S%>(#this, value: value);
+static method GenericExtension|genericWriteSetterNamed<T extends core::Object? = dynamic, S extends self::GenericExtension|genericWriteSetterNamed::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|genericWriteSetterNamed::T%> #this, {self::GenericExtension|genericWriteSetterNamed::S? value = #C1}) → dynamic {
+  self::GenericExtension|set#property<self::GenericExtension|genericWriteSetterNamed::T%>(#this, value);
 }
-static method GenericExtension|get#property<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#property::T*>* #this) → self::GenericExtension|get#property::T*
-  return #this.{self::GenericClass::field}{self::GenericExtension|get#property::T*};
-static method GenericExtension|set#property<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|set#property::T*>* #this, self::GenericExtension|set#property::T* value) → void {
+static method GenericExtension|get#property<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#property::T%> #this) → self::GenericExtension|get#property::T?
+  return #this.{self::GenericClass::field}{self::GenericExtension|get#property::T?};
+static method GenericExtension|set#property<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|set#property::T%> #this, self::GenericExtension|set#property::T? value) → void {
   #this.{self::GenericClass::field} = value;
 }
-static method GenericExtension|get#tearOffGetterNoArgs<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterNoArgs::T*>* #this) → dynamic
-  return self::GenericExtension|get#readGetter<self::GenericExtension|get#tearOffGetterNoArgs::T*>(#this);
-static method GenericExtension|get#tearOffGetterRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterRequired::T*>* #this) → dynamic
-  return self::GenericExtension|get#writeSetterRequired<self::GenericExtension|get#tearOffGetterRequired::T*>(#this);
-static method GenericExtension|get#tearOffGetterOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterOptional::T*>* #this) → dynamic
-  return self::GenericExtension|get#writeSetterOptional<self::GenericExtension|get#tearOffGetterOptional::T*>(#this);
-static method GenericExtension|get#tearOffGetterNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterNamed::T*>* #this) → dynamic
-  return self::GenericExtension|get#writeSetterNamed<self::GenericExtension|get#tearOffGetterNamed::T*>(#this);
-static method GenericExtension|get#tearOffGetterGenericRequired<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericRequired::T*>* #this) → dynamic
-  return self::GenericExtension|get#genericWriteSetterRequired<self::GenericExtension|get#tearOffGetterGenericRequired::T*>(#this);
-static method GenericExtension|get#tearOffGetterGenericOptional<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericOptional::T*>* #this) → dynamic
-  return self::GenericExtension|get#genericWriteSetterOptional<self::GenericExtension|get#tearOffGetterGenericOptional::T*>(#this);
-static method GenericExtension|get#tearOffGetterGenericNamed<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericNamed::T*>* #this) → dynamic
-  return self::GenericExtension|get#genericWriteSetterNamed<self::GenericExtension|get#tearOffGetterGenericNamed::T*>(#this);
-static method GenericExtension|invocations<T extends core::Object* = dynamic, S extends self::GenericExtension|invocations::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|invocations::T*>* #this, self::GenericExtension|invocations::S* value) → dynamic {
-  self::GenericExtension|readGetter<self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|writeSetterRequired<self::GenericExtension|invocations::T*>(#this, value);
-  self::GenericExtension|writeSetterOptional<self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|writeSetterOptional<self::GenericExtension|invocations::T*>(#this, value);
-  self::GenericExtension|writeSetterNamed<self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|writeSetterNamed<self::GenericExtension|invocations::T*>(#this, value: value);
-  self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this, value);
-  self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this, value);
-  self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this, value);
-  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this);
-  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this, value);
-  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this, value);
-  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this, value);
-  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this);
-  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this);
-  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this, value: value);
-  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::T*>(#this, value: value);
-  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T*, self::GenericExtension|invocations::S*>(#this, value: value);
+static method GenericExtension|get#tearOffGetterNoArgs<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterNoArgs::T%> #this) → dynamic
+  return self::GenericExtension|get#readGetter<self::GenericExtension|get#tearOffGetterNoArgs::T%>(#this);
+static method GenericExtension|get#tearOffGetterRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterRequired::T%> #this) → dynamic
+  return self::GenericExtension|get#writeSetterRequired<self::GenericExtension|get#tearOffGetterRequired::T%>(#this);
+static method GenericExtension|get#tearOffGetterOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterOptional::T%> #this) → dynamic
+  return self::GenericExtension|get#writeSetterOptional<self::GenericExtension|get#tearOffGetterOptional::T%>(#this);
+static method GenericExtension|get#tearOffGetterNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterNamed::T%> #this) → dynamic
+  return self::GenericExtension|get#writeSetterNamed<self::GenericExtension|get#tearOffGetterNamed::T%>(#this);
+static method GenericExtension|get#tearOffGetterGenericRequired<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericRequired::T%> #this) → dynamic
+  return self::GenericExtension|get#genericWriteSetterRequired<self::GenericExtension|get#tearOffGetterGenericRequired::T%>(#this);
+static method GenericExtension|get#tearOffGetterGenericOptional<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericOptional::T%> #this) → dynamic
+  return self::GenericExtension|get#genericWriteSetterOptional<self::GenericExtension|get#tearOffGetterGenericOptional::T%>(#this);
+static method GenericExtension|get#tearOffGetterGenericNamed<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffGetterGenericNamed::T%> #this) → dynamic
+  return self::GenericExtension|get#genericWriteSetterNamed<self::GenericExtension|get#tearOffGetterGenericNamed::T%>(#this);
+static method GenericExtension|invocations<T extends core::Object? = dynamic, S extends self::GenericExtension|invocations::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|invocations::T%> #this, self::GenericExtension|invocations::S% value) → dynamic {
+  self::GenericExtension|readGetter<self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|writeSetterRequired<self::GenericExtension|invocations::T%>(#this, value);
+  self::GenericExtension|writeSetterOptional<self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|writeSetterOptional<self::GenericExtension|invocations::T%>(#this, value);
+  self::GenericExtension|writeSetterNamed<self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|writeSetterNamed<self::GenericExtension|invocations::T%>(#this, value: value);
+  self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this, value);
+  self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this, value);
+  self::GenericExtension|genericWriteSetterRequired<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this, value);
+  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this);
+  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this, value);
+  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this, value);
+  self::GenericExtension|genericWriteSetterOptional<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this, value);
+  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this);
+  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this);
+  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this, value: value);
+  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::T%>(#this, value: value);
+  self::GenericExtension|genericWriteSetterNamed<self::GenericExtension|invocations::T%, self::GenericExtension|invocations::S%>(#this, value: value);
 }
-static method GenericExtension|get#invocations<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#invocations::T*>* #this) → <S extends self::GenericExtension|get#invocations::T* = dynamic>(S*) →* dynamic
-  return <S extends self::GenericExtension|get#invocations::T* = dynamic>(S* value) → dynamic => self::GenericExtension|invocations<self::GenericExtension|get#invocations::T*, S*>(#this, value);
-static method GenericExtension|tearOffs<T extends core::Object* = dynamic, S extends self::GenericExtension|tearOffs::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|tearOffs::T*>* #this, self::GenericExtension|tearOffs::S* value) → dynamic {
-  () →* self::GenericExtension|tearOffs::T* tearOffNoArgs = self::GenericExtension|get#readGetter<self::GenericExtension|tearOffs::T*>(#this);
-  tearOffNoArgs(){() →* self::GenericExtension|tearOffs::T*};
-  (self::GenericExtension|tearOffs::T*) →* dynamic tearOffRequired = self::GenericExtension|get#writeSetterRequired<self::GenericExtension|tearOffs::T*>(#this);
-  tearOffRequired(value){(self::GenericExtension|tearOffs::T*) →* dynamic};
-  ([self::GenericExtension|tearOffs::T*]) →* dynamic tearOffOptional = self::GenericExtension|get#writeSetterOptional<self::GenericExtension|tearOffs::T*>(#this);
-  tearOffOptional(){([self::GenericExtension|tearOffs::T*]) →* dynamic};
-  tearOffOptional(value){([self::GenericExtension|tearOffs::T*]) →* dynamic};
-  ({value: self::GenericExtension|tearOffs::T*}) →* dynamic tearOffNamed = self::GenericExtension|get#writeSetterNamed<self::GenericExtension|tearOffs::T*>(#this);
-  tearOffNamed(){({value: self::GenericExtension|tearOffs::T*}) →* dynamic};
-  tearOffNamed(value: value){({value: self::GenericExtension|tearOffs::T*}) →* dynamic};
-  <S extends self::GenericExtension|tearOffs::T* = dynamic>(S*) →* dynamic genericTearOffRequired = self::GenericExtension|get#genericWriteSetterRequired<self::GenericExtension|tearOffs::T*>(#this);
-  genericTearOffRequired<self::GenericExtension|tearOffs::S*>(value){(self::GenericExtension|tearOffs::S*) →* dynamic};
-  genericTearOffRequired<self::GenericExtension|tearOffs::T*>(value){(self::GenericExtension|tearOffs::T*) →* dynamic};
-  genericTearOffRequired<self::GenericExtension|tearOffs::S*>(value){(self::GenericExtension|tearOffs::S*) →* dynamic};
-  <S extends self::GenericExtension|tearOffs::T* = dynamic>([S*]) →* dynamic genericTearOffOptional = self::GenericExtension|get#genericWriteSetterOptional<self::GenericExtension|tearOffs::T*>(#this);
-  genericTearOffOptional<self::GenericExtension|tearOffs::T*>(){([self::GenericExtension|tearOffs::T*]) →* dynamic};
-  genericTearOffOptional<self::GenericExtension|tearOffs::T*>(){([self::GenericExtension|tearOffs::T*]) →* dynamic};
-  genericTearOffOptional<self::GenericExtension|tearOffs::S*>(){([self::GenericExtension|tearOffs::S*]) →* dynamic};
-  genericTearOffOptional<self::GenericExtension|tearOffs::S*>(value){([self::GenericExtension|tearOffs::S*]) →* dynamic};
-  genericTearOffOptional<self::GenericExtension|tearOffs::T*>(value){([self::GenericExtension|tearOffs::T*]) →* dynamic};
-  genericTearOffOptional<self::GenericExtension|tearOffs::S*>(value){([self::GenericExtension|tearOffs::S*]) →* dynamic};
-  <S extends self::GenericExtension|tearOffs::T* = dynamic>({value: S*}) →* dynamic genericTearOffNamed = self::GenericExtension|get#genericWriteSetterNamed<self::GenericExtension|tearOffs::T*>(#this);
-  genericTearOffNamed<self::GenericExtension|tearOffs::T*>(){({value: self::GenericExtension|tearOffs::T*}) →* dynamic};
-  genericTearOffNamed<self::GenericExtension|tearOffs::T*>(){({value: self::GenericExtension|tearOffs::T*}) →* dynamic};
-  genericTearOffNamed<self::GenericExtension|tearOffs::S*>(){({value: self::GenericExtension|tearOffs::S*}) →* dynamic};
-  genericTearOffNamed<self::GenericExtension|tearOffs::S*>(value: value){({value: self::GenericExtension|tearOffs::S*}) →* dynamic};
-  genericTearOffNamed<self::GenericExtension|tearOffs::T*>(value: value){({value: self::GenericExtension|tearOffs::T*}) →* dynamic};
-  genericTearOffNamed<self::GenericExtension|tearOffs::S*>(value: value){({value: self::GenericExtension|tearOffs::S*}) →* dynamic};
+static method GenericExtension|get#invocations<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#invocations::T%> #this) → <S extends self::GenericExtension|get#invocations::T% = dynamic>(S%) → dynamic
+  return <S extends self::GenericExtension|get#invocations::T% = dynamic>(S% value) → dynamic => self::GenericExtension|invocations<self::GenericExtension|get#invocations::T%, S%>(#this, value);
+static method GenericExtension|tearOffs<T extends core::Object? = dynamic, S extends self::GenericExtension|tearOffs::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|tearOffs::T%> #this, self::GenericExtension|tearOffs::S% value) → dynamic {
+  () → self::GenericExtension|tearOffs::T? tearOffNoArgs = self::GenericExtension|get#readGetter<self::GenericExtension|tearOffs::T%>(#this);
+  tearOffNoArgs(){() → self::GenericExtension|tearOffs::T?};
+  (self::GenericExtension|tearOffs::T%) → dynamic tearOffRequired = self::GenericExtension|get#writeSetterRequired<self::GenericExtension|tearOffs::T%>(#this);
+  tearOffRequired(value){(self::GenericExtension|tearOffs::T%) → dynamic};
+  ([self::GenericExtension|tearOffs::T?]) → dynamic tearOffOptional = self::GenericExtension|get#writeSetterOptional<self::GenericExtension|tearOffs::T%>(#this);
+  tearOffOptional(){([self::GenericExtension|tearOffs::T?]) → dynamic};
+  tearOffOptional(value){([self::GenericExtension|tearOffs::T?]) → dynamic};
+  ({value: self::GenericExtension|tearOffs::T?}) → dynamic tearOffNamed = self::GenericExtension|get#writeSetterNamed<self::GenericExtension|tearOffs::T%>(#this);
+  tearOffNamed(){({value: self::GenericExtension|tearOffs::T?}) → dynamic};
+  tearOffNamed(value: value){({value: self::GenericExtension|tearOffs::T?}) → dynamic};
+  <S extends self::GenericExtension|tearOffs::T% = dynamic>(S%) → dynamic genericTearOffRequired = self::GenericExtension|get#genericWriteSetterRequired<self::GenericExtension|tearOffs::T%>(#this);
+  genericTearOffRequired<self::GenericExtension|tearOffs::S%>(value){(self::GenericExtension|tearOffs::S%) → dynamic};
+  genericTearOffRequired<self::GenericExtension|tearOffs::T%>(value){(self::GenericExtension|tearOffs::T%) → dynamic};
+  genericTearOffRequired<self::GenericExtension|tearOffs::S%>(value){(self::GenericExtension|tearOffs::S%) → dynamic};
+  <S extends self::GenericExtension|tearOffs::T% = dynamic>([S?]) → dynamic genericTearOffOptional = self::GenericExtension|get#genericWriteSetterOptional<self::GenericExtension|tearOffs::T%>(#this);
+  genericTearOffOptional<self::GenericExtension|tearOffs::T%>(){([self::GenericExtension|tearOffs::T?]) → dynamic};
+  genericTearOffOptional<self::GenericExtension|tearOffs::T%>(){([self::GenericExtension|tearOffs::T?]) → dynamic};
+  genericTearOffOptional<self::GenericExtension|tearOffs::S%>(){([self::GenericExtension|tearOffs::S?]) → dynamic};
+  genericTearOffOptional<self::GenericExtension|tearOffs::S%>(value){([self::GenericExtension|tearOffs::S?]) → dynamic};
+  genericTearOffOptional<self::GenericExtension|tearOffs::T%>(value){([self::GenericExtension|tearOffs::T?]) → dynamic};
+  genericTearOffOptional<self::GenericExtension|tearOffs::S%>(value){([self::GenericExtension|tearOffs::S?]) → dynamic};
+  <S extends self::GenericExtension|tearOffs::T% = dynamic>({value: S?}) → dynamic genericTearOffNamed = self::GenericExtension|get#genericWriteSetterNamed<self::GenericExtension|tearOffs::T%>(#this);
+  genericTearOffNamed<self::GenericExtension|tearOffs::T%>(){({value: self::GenericExtension|tearOffs::T?}) → dynamic};
+  genericTearOffNamed<self::GenericExtension|tearOffs::T%>(){({value: self::GenericExtension|tearOffs::T?}) → dynamic};
+  genericTearOffNamed<self::GenericExtension|tearOffs::S%>(){({value: self::GenericExtension|tearOffs::S?}) → dynamic};
+  genericTearOffNamed<self::GenericExtension|tearOffs::S%>(value: value){({value: self::GenericExtension|tearOffs::S?}) → dynamic};
+  genericTearOffNamed<self::GenericExtension|tearOffs::T%>(value: value){({value: self::GenericExtension|tearOffs::T?}) → dynamic};
+  genericTearOffNamed<self::GenericExtension|tearOffs::S%>(value: value){({value: self::GenericExtension|tearOffs::S?}) → dynamic};
 }
-static method GenericExtension|get#tearOffs<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffs::T*>* #this) → <S extends self::GenericExtension|get#tearOffs::T* = dynamic>(S*) →* dynamic
-  return <S extends self::GenericExtension|get#tearOffs::T* = dynamic>(S* value) → dynamic => self::GenericExtension|tearOffs<self::GenericExtension|get#tearOffs::T*, S*>(#this, value);
-static method GenericExtension|getterCalls<T extends core::Object* = dynamic, S extends self::GenericExtension|getterCalls::T* = dynamic>(lowered final self::GenericClass<self::GenericExtension|getterCalls::T*>* #this, self::GenericExtension|getterCalls::S* value) → dynamic {
-  self::GenericExtension|get#tearOffGetterNoArgs<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call();
-  self::GenericExtension|get#tearOffGetterRequired<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call(value);
-  self::GenericExtension|get#tearOffGetterOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call();
-  self::GenericExtension|get#tearOffGetterOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call(value);
-  self::GenericExtension|get#tearOffGetterNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call();
-  self::GenericExtension|get#tearOffGetterNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call(value: value);
-  self::GenericExtension|get#tearOffGetterGenericRequired<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call(value);
-  self::GenericExtension|get#tearOffGetterGenericRequired<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::T*>(value);
-  self::GenericExtension|get#tearOffGetterGenericRequired<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::S*>(value);
-  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call();
-  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::T*>();
-  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::S*>();
-  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call(value);
-  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::T*>(value);
-  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::S*>(value);
-  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call();
-  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::T*>();
-  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::S*>();
-  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call(value: value);
-  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::T*>(value: value);
-  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T*>(#this){dynamic}.call<self::GenericExtension|getterCalls::S*>(value: value);
+static method GenericExtension|get#tearOffs<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#tearOffs::T%> #this) → <S extends self::GenericExtension|get#tearOffs::T% = dynamic>(S%) → dynamic
+  return <S extends self::GenericExtension|get#tearOffs::T% = dynamic>(S% value) → dynamic => self::GenericExtension|tearOffs<self::GenericExtension|get#tearOffs::T%, S%>(#this, value);
+static method GenericExtension|getterCalls<T extends core::Object? = dynamic, S extends self::GenericExtension|getterCalls::T% = dynamic>(lowered final self::GenericClass<self::GenericExtension|getterCalls::T%> #this, self::GenericExtension|getterCalls::S% value) → dynamic {
+  self::GenericExtension|get#tearOffGetterNoArgs<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call();
+  self::GenericExtension|get#tearOffGetterRequired<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call(value);
+  self::GenericExtension|get#tearOffGetterOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call();
+  self::GenericExtension|get#tearOffGetterOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call(value);
+  self::GenericExtension|get#tearOffGetterNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call();
+  self::GenericExtension|get#tearOffGetterNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call(value: value);
+  self::GenericExtension|get#tearOffGetterGenericRequired<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call(value);
+  self::GenericExtension|get#tearOffGetterGenericRequired<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::T%>(value);
+  self::GenericExtension|get#tearOffGetterGenericRequired<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::S%>(value);
+  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call();
+  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::T%>();
+  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::S%>();
+  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call(value);
+  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::T%>(value);
+  self::GenericExtension|get#tearOffGetterGenericOptional<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::S%>(value);
+  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call();
+  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::T%>();
+  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::S%>();
+  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call(value: value);
+  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::T%>(value: value);
+  self::GenericExtension|get#tearOffGetterGenericNamed<self::GenericExtension|getterCalls::T%>(#this){dynamic}.call<self::GenericExtension|getterCalls::S%>(value: value);
 }
-static method GenericExtension|get#getterCalls<T extends core::Object* = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#getterCalls::T*>* #this) → <S extends self::GenericExtension|get#getterCalls::T* = dynamic>(S*) →* dynamic
-  return <S extends self::GenericExtension|get#getterCalls::T* = dynamic>(S* value) → dynamic => self::GenericExtension|getterCalls<self::GenericExtension|get#getterCalls::T*, S*>(#this, value);
+static method GenericExtension|get#getterCalls<T extends core::Object? = dynamic>(lowered final self::GenericClass<self::GenericExtension|get#getterCalls::T%> #this) → <S extends self::GenericExtension|get#getterCalls::T% = dynamic>(S%) → dynamic
+  return <S extends self::GenericExtension|get#getterCalls::T% = dynamic>(S% value) → dynamic => self::GenericExtension|getterCalls<self::GenericExtension|get#getterCalls::T%, S%>(#this, value);
 static method main() → dynamic {}
 
 constants  {