70479beea5
This avoids terms like "NNBD" and "strong" in favor of sound/unsound null safety. Change-Id: I1c99bea7155f80bc6acf62f46c6f266a29ebf1a2 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/213406 Commit-Queue: Mayank Patke <fishythefish@google.com> Reviewed-by: Sigmund Cherem <sigmund@google.com>