9ad76fe7bd
The fix includes processing of type parameters elsewhere and also adding support for annotations on extensions. Closes #28981 TEST=existing Change-Id: I71ab5640bd3a16f4a024b6edd047a525eed1c399 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/191404 Commit-Queue: Johnni Winther <johnniwinther@google.com> Reviewed-by: Dmitry Stefantsov <dmitryas@google.com>