pkg/front_end/testcases/extensions/export_twice_lib1.dart

// Copyright (c) 2019, 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 Class {}

extension Extension on Class {
  method() {}
}