9d949a2498
`isNullSafetyEnabled` is now flipped to true in ResolutionTest, and only overridden to false in WithoutNullSafetyMixin. Change-Id: If10a5ba852eada2f719450118683a6d42c1002e9 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/340640 Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Commit-Queue: Samuel Rawlins <srawlins@google.com>