Creates a Stream containing the result of this future.
The stream will produce single data or error event containing the completion result of this future, and then it will close with a done event.
If the future never completes, the stream will not produce any events.
Stream<T> asStream();
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/2.0.0/dart-async/Future/asStream.html