Код-ревью: утечки контроллеров и подписок

class _SearchState extends State<Search> {
  final _controller = TextEditingController();
  late AnimationController _anim;
  StreamSubscription? _sub;

  @override
  void initState() {
    _anim = AnimationController(vsync: this, duration: const Duration(milliseconds: 200));
    _sub = widget.repo.results.listen((r) => setState(() => _results = r));
    final locale = Localizations.localeOf(context);
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    final focus = FocusNode();
    return TextField(controller: _controller, focusNode: focus);
  }

  @override
  void dispose() {
    super.dispose();
    _anim.dispose();
  }
}