@Test
public void testIsMapFieldMapOfStringSets_EmptyMaps() throws Exception {

    Map<String, Set<String>> roleMap = new HashMap<>();
    Project project = new Project().setName("pname").setRoles(roleMap);
    boolean b = isMapFieldMapOfStringSets(Project._Fields.ROLES, project, project, project, Logger.getLogger(CommonUtilsTest.class));
    assertThat(b, is(false));
}