Object writeReplace() {
    return new EntrySetSerializedForm<>(map());
  }

  @GwtIncompatible
  @J2ktIncompatible
    private void readObject(ObjectInputStream stream) throws InvalidObjectException {
    throw new InvalidObjectException("Use EntrySetSerializedForm");
  }

  @GwtIncompatible
  @J2ktIncompatible
  private static final class EntrySetSerializedForm<K, V> implements Serializable {

  Object writeReplace() {
    return new EntrySetSerializedForm<>(map());
  }

  @GwtIncompatible
  @J2ktIncompatible
    private void readObject(ObjectInputStream stream) throws InvalidObjectException {
    throw new InvalidObjectException("Use EntrySetSerializedForm");
  }

  @GwtIncompatible
  @J2ktIncompatible
  private static final class EntrySetSerializedForm<K, V> implements Serializable {

    @J2ktIncompatible
    @Override
        Object writeReplace() {
      return new EntrySetSerializedForm<E>(ImmutableMultiset.this);
    }

    @GwtIncompatible
    @J2ktIncompatible
        private void readObject(ObjectInputStream stream) throws InvalidObjectException {
      throw new InvalidObjectException("Use EntrySetSerializedForm");
    }