code: public void     putMulti(MultiItem<T> items, int priority) throws Exception
      {
          putMulti(items, priority, 0, null);
      }
docs: Add a set of items with the same priority into the queue. Adding is done in the background - thus, this method will
  return quickly.<br><br>
  NOTE: if an upper bound was set via {@link QueueBuilder#maxItems}, this method will
  block until there is available space in the queue.
  
  @param items items to add
  @param priority item priority - lower numbers come out of the queue first
  @throws Exception connection issues