code: public void     putMulti(MultiItem<T> items, long delayUntilEpoch) throws Exception
      {
          putMulti(items, delayUntilEpoch, 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 delayUntilEpoch future epoch (milliseconds) when this item will be available to consumers
  @throws Exception connection issues