Multimap<String, Integer> multimap = initializeMultimap5();
    assertOrderingReadOnly(synchronizedMultimap(multimap));
  }

  @J2ktIncompatible
  @GwtIncompatible // SeriazableTester
  public void testSerializationOrdering() {
    Multimap<String, Integer> multimap = initializeMultimap5();
    Multimap<String, Integer> copy = SerializableTester.reserializeAndAssert(multimap);
    assertOrderingReadOnly(copy);
  }