flush method

@override Future<void> flush()

Flushes any buffered backend output.

Implementation

@override
Future<void> flush() {
  final existing = _stdoutFlushInFlight;
  if (existing != null) return existing;
  final future = _flushStdoutAll();
  _stdoutFlushInFlight = future.whenComplete(() {
    _stdoutFlushInFlight = null;
  });
  return _stdoutFlushInFlight!;
}