map.clear();
    assertEquals(emptyList(), foos);
    assertThat(values).isEmpty();
    assertEquals("[]", map.entries().toString());
    assertEquals("{}", map.toString());
  }

  public void testLinkedKeySet() {
    Multimap<String, Integer> map = create();
    map.put("bar", 1);
    map.put("foo", 2);
    map.put("bar", 3);
    map.put("bar", 4);
    assertEquals("[bar, foo]", map.keySet().toString());