@Test
public void testExpandWhenOneNestedListIsEmpty() {

    List schema = Arrays.asList(new Object(), Arrays.asList(new Object(), new Object()), new Object(), new Object());
    List<List> list = Arrays.asList(
            (List) Arrays.asList(11, new ArrayList(), 12, 13)
    );
    List<List> expected = Arrays.asList(
            (List) Arrays.asList(11, null, null, 12, 13)
    );
    List<List> actual = PartnerResultToCrtesianTable.expand(list, schema);
    assertEquals(actual, expected);
}