ArrayListMultimap<String, Integer> multimap = ArrayListMultimap.create(original);
    assertEquals(20, multimap.expectedValuesPerKey);
  }

  public void testTrimToSize() {
    ArrayListMultimap<String, Integer> multimap = ArrayListMultimap.create();
    multimap.put("foo", 1);
    multimap.put("foo", 2);
    multimap.put("bar", 3);
    multimap.trimToSize();