@Override
  public void validateKeyPresent(final SourceName sinkName) {
    getSource().validateKeyPresent(sinkName, projection);
  }
@Test
  public void shouldValidateKeysByCallingSourceWithProjection() {
    // When:
    projectNode.validateKeyPresent(SOURCE_NAME);

    // Then:
    verify(source).validateKeyPresent(SOURCE_NAME, Projection.of(selects));
  }