2083db9cdb
It is an error to mix in a class declaration that does not have the 'mixin' modifier, outside of its library for class declarations in a library version lower than sealed class' release version. Change-Id: I318bb243705748eae60482b6c3513669f1cbb90c Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/275440 Reviewed-by: Johnni Winther <johnniwinther@google.com>
This directory contains tests of the language and core library implementations. For more information, see https://github.com/dart-lang/sdk/wiki/Testing.