@Override
    public Iterator<V> iterator() {
      return valueIterator();
    }

    @Override
    public Spliterator<V> spliterator() {
      return valueSpliterator();
    }

    @Override
    public int size() {
      return AbstractMultimap.this.size();
    }

    @Override
    public boolean contains(@Nullable Object o) {

  }

  @Override
  Iterator<V> valueIterator() {
    return Maps.valueIterator(entryIterator());
  }

  @Override
  Spliterator<V> valueSpliterator() {
    return CollectSpliterators.map(entrySpliterator(), Spliterator.ORDERED, Entry::getValue);
  }

  /**
   * @serialData the expected values per key, the number of distinct keys, the number of entries,