@Test
public void testMax() {

    TrackingMultimap<Object, Long> tmmap = TrackingLinkedHashMultimap
            .create(ObjectResultDataset.OBJECT_COMPARATOR);
    tmmap.insert(2, 1L);
    tmmap.insert(1, 2L);
    tmmap.insert(30, 3L);
    tmmap.insert(4, 4L);
    Assert.assertEquals(30, tmmap.max());
}