code: public void stop(int mode) {
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) 
        SibTr.entry(tc, "stop");
         
      super.stop(mode); 
  
      // Signal the MQLink component to stop
      try 
      {
        if(_mqLinkObject != null)
          _mqLinkObject.stop();
        
        
      } 
      catch (SIResourceException e) 
      {
        // No FFDC code needed
        
        SibTr.exception(tc, e);
        
        // The MQLink component will have FFDC'd we'll trace
        // the problem but allow processing to continue  
      } 
      catch (SIException e) 
      {
        // No FFDC code needed
        
        SibTr.exception(tc, e);
        
        // The MQLink component will have FFDC'd we'll trace
        // the problem but allow processing to continue  
      }
    
      _mqLinkManager.undefine(getUuid()); 
             
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) 
        SibTr.exit(tc, "stop");    
    }
docs: This stop method overrides the stop method in BaseDestinationHandler and is driven when the ME
  is stopped. As well as performing the normal stop processing for the MQLink object, it also
  ensures that the uuid of the the MQLink is undefined from the set managed by the TRM. Otherwise,
  there is the potential to add the uuid of the same MQLink twice.
  
  Additionally, call the MQLink component via the MQLinkObjct to notify
  it that we are stopping.
  
  @param mode - stop mode