this.sessionEndpoint.connectionEndpoint.getServerPeer().getMessageStore().removeReference(messageID);
   void acknowledge(String messageID)   {      try      {         Delivery d = (Delivery)deliveries.get(messageID);         d.acknowledge();         deliveries.remove(messageID);      }      catch(Throwable t)      {         log.error("Message " + messageID + "cannot be acknowledged to the source");      }   }