@Override
    String toString();
  }

  private static class NoDelegateToEquals implements Equals {

    private static Function<Equals, Equals> WRAPPER =
        new Function<Equals, Equals>() {
          @Override
          public NoDelegateToEquals apply(Equals delegate) {
            return new NoDelegateToEquals(delegate);
          }
        };

    private final Equals delegate;