pkg/front_end/testcases/general/subtype_function.dart

// Copyright (c) 2023, 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=2.19

class A extends Function {}

class B implements Function {}

class C with Function {}