docs: public void eventPostRollbackAdd(Transaction transaction) throws SevereMessageStoreException 
    {    
      super.eventPostRollbackAdd(transaction);
        
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
        SibTr.entry(tc, "eventPostRollbackAdd", transaction);
        
      if (_handler != null)
      {      
        _handler.removeTopic(_topic);
          
          // If this was the last topic reference, then delete the PubSub output 
          // handler.
          if (_handler.getTopics()== null || _handler.getTopics().length == 0)
          {
            if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled())
              SibTr.debug(tc, "Deleting PubSubOutputHandler " + _handler);
    
            _destination.deletePubSubOutputHandler(_neighbour.getUUID());
          }
  
        }
        else if (_neighbours!=null)
          _neighbours.removeTopicSpaceReference(_neighbour.getUUID(), 
                                                this,
                                                _topicSpaceUuid,
                                                _topic);
        
        // Remove the subscription from the list.
        _neighbour.removeSubscription(_topicSpaceUuid, _topic);
      
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
        SibTr.exit(tc, "eventPostRollbackAdd");
    }