code: @Override
      public void sendSilenceMessage(
                                     long startStamp,
                                     long endStamp,
                                     long completedPrefix,
                                     boolean requestedOnly,
                                     int priority,
                                     Reliability reliability,
                                     SIBUuid12 stream)
      {
          // NOP, the PubSubInputHandler doesn't originate
          // silence.  The associated output handlers do it
          // for us.
      }
docs: /*
  (non-Javadoc)
  
  @see com.ibm.ws.sib.processor.impl.interfaces.DownstreamControl#sendSilenceMessage(long, long, long, com.ibm.ws.sib.trm.topology.Cellule, int,
  com.ibm.ws.sib.common.Reliability)