pkg/front_end/testcases/nnbd_mixed/super_set_from_opt_in_lib.dart

// Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

abstract class SuperClass<T> {
  @override
  Object? property;
}