@Test
public void testWithEmptyConstituents() {

    StringListType call1 = new StringListType(",0699222222");
    assertEquals("", call1.getValue(0));
    assertEquals("0699222222", call1.getValue(1));
    StringListType call2 = new StringListType("0699222222,");
    assertEquals("0699222222", call2.getValue(0));
    assertEquals("", call2.getValue(1));
}