docs: public void messagingEngineStopping(
              final JsMessagingEngine messagingEngine, final int mode) {
  
          final String methodName = "messagingEngineStopping";
          if (TraceComponent.isAnyTracingEnabled() && TRACE.isEntryEnabled()) {
              SibTr.entry(this, TRACE, methodName, new Object[] {
                      messagingEngine, mode });
          }
  
          closeConnection(messagingEngine);
  
          if (TraceComponent.isAnyTracingEnabled() && TRACE.isEntryEnabled()) {
              SibTr.exit(this, TRACE, methodName);
          }
  
      }