stream method

*[<Null safety>](https://dart.dev/null-safety)*

Stream<bool> stream ()

Implementation

Stream<bool> stream() {
  late final StreamController<bool> controller;
  controller = StreamController<bool>(
    // ignore: unnecessary_lambdas
    onCancel: () => controller.close(),
  );
  isFocused().then((state) => controller
    ..add(state)
    ..addStream(_focusStateChanges));
  return controller.stream;
}