library;
import self as self;
import "dart:core" as core;
import "dart:collection" as col;

static method f(dynamic x) → void
  return block {
    final core::List<dynamic> #t1 = <dynamic>[];
    hoisted dynamic a;
    hoisted dynamic b;
    {
      final synthesized dynamic #0#0 = x as{TypeError,ForDynamic} (dynamic, dynamic);
      if(!(#0#0 is (core::Object?, core::Object?) && (let final dynamic #t2 = a = #0#0{(core::Object?, core::Object?)}.$1{core::Object?} in true) && (let final dynamic #t3 = b = #0#0{(core::Object?, core::Object?)}.$2{core::Object?} in true)))
        throw new core::StateError::•("Pattern matching error");
    }
    final dynamic #t4 = a;
    final dynamic #t5 = b;
    for (dynamic a = #t4, dynamic b = #t5; ; )
      #t1.{core::List::add}{Invariant}(a){(dynamic) → void};
  } =>#t1;
static method g(dynamic x) → void
  return block {
    final core::Set<dynamic> #t6 = col::LinkedHashSet::•<dynamic>();
    hoisted dynamic a;
    hoisted dynamic b;
    {
      final synthesized dynamic #0#0 = x as{TypeError,ForDynamic} (dynamic, dynamic);
      if(!(#0#0 is (core::Object?, core::Object?) && (let final dynamic #t7 = a = #0#0{(core::Object?, core::Object?)}.$1{core::Object?} in true) && (let final dynamic #t8 = b = #0#0{(core::Object?, core::Object?)}.$2{core::Object?} in true)))
        throw new core::StateError::•("Pattern matching error");
    }
    final dynamic #t9 = a;
    final dynamic #t10 = b;
    for (dynamic a = #t9, dynamic b = #t10; ; )
      #t6.{core::Set::add}{Invariant}(b){(dynamic) → core::bool};
  } =>#t6;
static method h(dynamic x) → void
  return block {
    final core::Map<dynamic, dynamic> #t11 = <dynamic, dynamic>{};
    hoisted dynamic a;
    hoisted dynamic b;
    {
      final synthesized dynamic #0#0 = x as{TypeError,ForDynamic} (dynamic, dynamic);
      if(!(#0#0 is (core::Object?, core::Object?) && (let final dynamic #t12 = a = #0#0{(core::Object?, core::Object?)}.$1{core::Object?} in true) && (let final dynamic #t13 = b = #0#0{(core::Object?, core::Object?)}.$2{core::Object?} in true)))
        throw new core::StateError::•("Pattern matching error");
    }
    final dynamic #t14 = a;
    final dynamic #t15 = b;
    for (dynamic a = #t14, dynamic b = #t15; ; )
      #t11.{core::Map::[]=}{Invariant}(a, b){(dynamic, dynamic) → void};
  } =>#t11;