01ee1880aa
The `featureFlag` becomes `null` when the feature is expired, the `featureString` is still available. Code was added by https://dart-review.googlesource.com/c/sdk/+/470920 . Change-Id: I5f19718d9431ff409907e82b2849d76415b739bc Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/505440 Commit-Queue: Lasse Nielsen <lrn@google.com> Reviewed-by: Konstantin Shcheglov <scheglov@google.com>