@Override
  public Iterator<V> iterator() {
    Node<V>[] t;
    CompactConcurrentHashSet2<V> m = this;
    int f = (t = m.table) == null ? 0 : t.length;
    return new KeyIterator<>(t, f, 0, f, m);
  }
Reconstitutes the instance from a stream (that is, deserializes it).

@param s the stream
geode-core/src/main/java/org/apache/geode/internal/concurrent/CompactConcurrentHashSet2.java