assertThrows(IllegalArgumentException.class, () -> LinkedHashMultimap.create(20, -15));
  }

  @GwtIncompatible // unreasonably slow
  public void testGetIteration() {
    new IteratorTester<Integer>(
        6,
        MODIFIABLE,
        new LinkedHashSet<>(asList(2, 3, 4, 7, 8)),
        IteratorTester.KnownOrder.KNOWN_ORDER) {