pkg/front_end/testcases/nnbd_mixed/hierarchy/opt_out.dart

// Copyright (c) 2021, 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.

// @dart=2.9

class A {}

class B extends A {}

main() {}