pkg/front_end/testcases/general/issue53462.dart.textual_outline.expect

typedef Callback = void Function();

class Foo {
  late final Callback? _koCallback;
  final Callback? _okCallback;
  Foo({Callback? okCallback, Callback? koCallback})
    : _okCallback = okCallback {}
  void thisWorks() {}
  void thisDoesNot() {}
}