runtime/observatory/tests/service/breakpoints_with_mixin_lib1.dart - sdk - Git at Google

 // 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.

 import "breakpoints_with_mixin_lib3.dart";

 class Test1 extends Object with FooMixin {}
	// 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.

	import "breakpoints_with_mixin_lib3.dart";

	class Test1 extends Object with FooMixin {}