public Spliterator<V> spliterator() {
          Node<V>[] t;
        ConcurrentLongObjectHashMap<V> m = map;
          long n = m.sumCount();
          int f = (t = m.table) == null ? 0 : t.length;
          return new ValueSpliterator<V>(t, f, 0, f, n < 0L ? 0L : n);
      }
public Spliterator<V> spliterator()