code: @Override
      public long getCountLowWaterMark() {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.entry(tc, "getCountLowWaterMark");
  
          long destLow = _destLowMsgs + getSubscriberCount();
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.exit(tc, "getCountLowWaterMark", Long.valueOf(destLow));
          return destLow;
      }
docs: /*
  (non-Javadoc)
  
  @see com.ibm.ws.sib.msgstore.ItemStream#getCountLowWaterMark()