# Copyright (c) 2017, 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.

main.dart.patch: |
  // Test that static methods can be added

  class C {
  <<<< "v1"
  ==== "v2"
    static foo() {
      print('v2');
    }
  >>>>
  }

  main() {
  <<<<
    print("v1");
  ====
      C.foo();
  >>>>
  }
