290c576264
Currently the transformed expectations are not checked. This will be implemented shortly. Mixin code from kmillikin@ (https://dart-review.googlesource.com/c/sdk/+/46060). Test from jensjoha@. Change-Id: If8abe4950b80bbec993833700bfeeb8be15f9585 Reviewed-on: https://dart-review.googlesource.com/46061 Reviewed-by: Jens Johansen <jensj@google.com> Reviewed-by: Peter von der Ahé <ahe@google.com> Commit-Queue: Samir Jindel <sjindel@google.com>