docs: public synchronized void updateTargetCellule( SIBUuid8 targetMEUuid ) throws SIResourceException
    {
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
        SibTr.entry(tc, "updateTargetCellule", targetMEUuid);
  
      if( pointTopoint)
      {
        this.targetMEUuid = targetMEUuid;
  
        StreamSet streamSet = getStreamSet();
  
         // We may not have had any messages yet in which case there
         // is no streamSet to update
        if( streamSet != null)
        {
          //Update the cellule in the StreamSet
          //and persist this
          streamSet.updateCellule(targetMEUuid);
          Transaction tran = txManager.createAutoCommitTransaction();
          try
          {
            streamSet.requestUpdate(tran);
          }
          catch (MessageStoreException e)
          {
            // MessageStoreException shouldn't occur so FFDC.
            FFDCFilter.processException(
              e,
              "com.ibm.ws.sib.processor.gd.SourceStreamManager.updateTargetCellule",
              "1:1384:1.102",
              this);
  
            SibTr.exception(tc, e);
  
            if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.exit(tc, "updateTargetCellule", e);
  
            throw new SIResourceException(e);
          }
  
          //iterate over the non-null streams
          Iterator itr = streamSet.iterator();
          while(itr.hasNext())
          {
            SourceStream stream = (SourceStream) itr.next();
            stream.noGuessesInStream();
          }
        }
      }
  
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
        SibTr.exit(tc, "updateTargetCellule");
    }