ref.releaseReference();
ref.release();
      public void afterRollback()      {         for(Iterator i = refs.iterator(); i.hasNext(); )         {            MessageReference ref = (MessageReference)i.next();            if (log.isTraceEnabled()) { log.trace(this + " releasing reference for " + ref + " after rollback"); }            ref.releaseReference();         }         txToAddReferenceCallbacks.remove(tx);      }