code: public String getMessagingEngineBus() {
          if (TraceComponent.isAnyTracingEnabled()
              && tc.isEntryEnabled())
              SibTr.entry(tc, "getMessagingEngineBus");
          String returnString = _engine.getBusName();
          if (TraceComponent.isAnyTracingEnabled()
              && tc.isEntryEnabled())
              SibTr.exit(tc, "getMessagingEngineBus", returnString);
          return returnString;
      }
docs: Gets the bus the messaging engine belongs to.
  
  @return