showAsync method

@override FutureOr<bool> showAsync()

Implementation

@override
FutureOr<bool> showAsync() {
  if (showing) return true;
  return super.showAsync().then((value) {
    if (showing) {
      _completedHide();
      _show = true;
      return fut.then((_) => value);
    }
    return value;
  });
}