multimap.put("foo", 1);
    multimap.put("bar", 2);
    multimap.put("foo", 3);
    assertEquals(ImmutableList.of(1, 3), multimap.get("foo"));
  }

  public void testCreateFromIllegalSize() {
    assertThrows(IllegalArgumentException.class, () -> LinkedListMultimap.create(-20));
  }

  public void testLinkedGetAdd() {
    LinkedListMultimap<String, Integer> map = create();