92f4eb58c8
Only positive implementation, no error states are checked yet. Change-Id: Iad79da1dd7e8be9229ee9d47c5301d39ebc3debc Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/154003 Commit-Queue: Johnni Winther <johnniwinther@google.com> Reviewed-by: Dmitry Stefantsov <dmitryas@google.com> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>