}
  }

  public void testMultipleInterfacesDefaultValue() {
    new MultipleInterfacesDefaultValueChecker().check();
  }

  private static class GenericInterface2DefaultValueChecker extends DefaultValueChecker {

    @SuppressWarnings("unused") // called by NullPointerTester
    @Keep
    public void checkArray(FromTo<String, FromTo<Integer, String>> f, String s) {