7c837ce30a
Some of the implicit casts were need for covariance checks. Now these can be identified and actively preserved. Change-Id: Ibfff4f68cc4af7956372adb2f4d846b079f0b508 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/134162 Reviewed-by: Sigmund Cherem <sigmund@google.com> Commit-Queue: Johnni Winther <johnniwinther@google.com>