code: protected JsJmsMessage getMsgReference() throws JMSException {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.entry(this, tc, "getMsgReference");
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.exit(this, tc, "getMsgReference", msg);
          return msg;
      }
docs: Get a Jetstream message representing the content of this JMS message.
  Used during the sending of messages.
  
  @return a Jetstream message which can be used to represent this message.
  @throws JMSException if a problem arises during the transformation of the JMS message
  to a Jetstream message.