assertEquals(ImmutableMap.of(2, 'd'), map.get("dog"));
    map.clear();
    assertTrue(map.isEmpty());
    assertEquals(ImmutableSet.of("bar", "foo"), sortedTable.rowKeySet());
  }

  public void testRowMapValuesAreSorted() {
    sortedTable = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c', "dog", 2, 'd');
    assertTrue(sortedTable.rowMap().get("foo") instanceof SortedMap);
  }

  public void testColumnKeySet_isSorted() {