fbb9f525be
This avoids a runtime typecheck failure because Future is Future<dynamic> which isn't a subtype of Future<T> for any T that is not a top type. Change-Id: I067987e27177f3ed81ec14101c965488f1c35e2e Reviewed-on: https://dart-review.googlesource.com/55281 Commit-Queue: Kevin Millikin <kmillikin@google.com> Reviewed-by: Peter von der Ahé <ahe@google.com>