assertEquals(Arrays.asList(1, 2, 3, 1, 6, 7), multimap.get("foo"));
    assertEquals(Arrays.asList(4, 5), multimap.get("bar"));
    assertEquals(8, multimap.size());
  }

  public void testBuilderPutWithDuplicates() {
    ImmutableListMultimap.Builder<String, Integer> builder = ImmutableListMultimap.builder();
    builder.putAll("foo", 1, 2, 3);
    builder.putAll("bar", 4, 5);
    builder.put("foo", 1);