code: protected final void beforeDelivery(MessageEndpoint endpoint) {
  
          if (TRACE.isEntryEnabled()) {
              final String methodName = "beforeDelivery";
              SibTr.entry(this, TRACE, methodName, endpoint);
              SibTr.exit(this, TRACE, methodName);
          }
  
      }
docs: Invoked before delivery of a message.