pkg/front_end/testcases/nnbd_mixed/mix_in_private_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.md file.

abstract class Private {
  void _privateAbstractMethod(int? i);
  void _privateConcreteMethod(int? i) {}
}