df678dbec0
Introduce enum NNBDMode for subtype test checking mode. Change-Id: Id9c39ee8c975c664ac58e313b7dd05e6e219dfc1 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/123557 Reviewed-by: Ryan Macnak <rmacnak@google.com> Reviewed-by: Alexander Markov <alexmarkov@google.com> Commit-Queue: Régis Crelier <regis@google.com>