@Test
public void test01() {

    Map<String, List<Object>> data = new HashMap<>();
    data.put("Foo", Lists.newArrayList(1, 1, 3, 3, 4));
    data.put("Bar", Lists.newArrayList("1a", "1b", "3a", "3b", "4a"));
    QueryResults queryResults = new QueryResults(data);
    QueryResults cqr = CoalescingDecorator.coalesce(queryResults, "Foo");
    assertEquals(cqr.getColumns(), 2);
    assertEquals(cqr.getRows(), 3);
}