assertEquals(ImmutableMap.of("google", googleValues, "foo", fooValues), asMap.headMap("h"));
    assertEquals(ImmutableMap.of("google", googleValues), asMap.subMap("g", "h"));
  }

  public void testTailSetClear() {
    TreeMultimap<String, Integer> multimap = TreeMultimap.create();
    multimap.put("a", 1);
    multimap.put("a", 11);
    multimap.put("b", 2);
    multimap.put("c", 3);
    multimap.put("d", 4);