assertEquals(3, multiset.size());
    assertEquals(2, multiset.count("foo"));
  }

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester
  public void testSerializationContainingSelf() {
    Multiset<Multiset<?>> multiset = HashMultiset.create();
    multiset.add(multiset, 2);
    Multiset<Multiset<?>> copy = SerializableTester.reserialize(multiset);
    assertEquals(2, copy.size());

    assertEquals(3, multiset.size());
    assertEquals(2, multiset.count("foo"));
  }

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester
  public void testSerializationContainingSelf() {
    Multiset<Multiset<?>> multiset = HashMultiset.create();
    multiset.add(multiset, 2);
    Multiset<Multiset<?>> copy = SerializableTester.reserialize(multiset);
    assertEquals(2, copy.size());