assertOrderingReadOnly(copy);
  }

  @J2ktIncompatible
  @GwtIncompatible // SeriazableTester
  public void testSerializationOrderingKeysAndEntries() {
    SetMultimap<String, Integer> multimap = LinkedHashMultimap.create();
    multimap.put("a", 1);
    multimap.put("b", 2);
    multimap.put("a", 3);
    multimap.put("c", 4);