@Override
  public void populateDisplayData(DisplayData.Builder builder) {
    builder.delegate(delegate());
  }
@Test
  public void populateDisplayDataDelegates() {
    doThrow(RuntimeException.class)
        .when(delegate)
        .populateDisplayData(any(DisplayData.Builder.class));

    thrown.expect(RuntimeException.class);
    DisplayData.from(forwarding);
  }