@SuppressWarnings("unchecked") public T next() { return (T)queueItr.next(); }
@SuppressWarnings("unchecked") public T peek() { return (T)queueItr.peek(); }
public boolean isClosed() { return queueItr.isClosed(); } }
public void close() { queueItr.close(); }
public boolean hasNext() { return queueItr.hasNext(); }