@Test
public void testGetPeopleWithMultivaluedAttributesNullResult() {

    GroovyPersonAttributeDao nullResponseDao = new GroovyPersonAttributeDao(loadGroovyClass("SampleGroovyPersonAttributeDaoForTestingUpdates.groovy"));
    final Set<IPersonAttributes> results = nullResponseDao.getPeopleWithMultivaluedAttributes(items, IPersonAttributeDaoFilter.alwaysChoose());
    assertNull(results);
}