39870102e6
From Lasse's comment in https://dart-review.googlesource.com/c/sdk/+/486525. Added many more combinations of extends, implements and mixin applications to `empty_body_test.dart`. Bug: https://github.com/dart-lang/sdk/issues/61687 Change-Id: Ie26c7661d6505d21c2f457b285f1ef1b88b8e6ac Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/486863 Reviewed-by: Lasse Nielsen <lrn@google.com> Commit-Queue: Kallen Tu <kallentu@google.com>