code: protected SITransaction getTransaction() {
  
          if (TRACE.isEntryEnabled()) {
              final String methodName = "getTransaction";
              SibTr.entry(this, TRACE, methodName);
              SibTr.exit(this, TRACE, methodName, null);
          }
          return null;
  
      }
docs: Returns the transaction, if any, used to deliver the message.
  
  @return always returns <code>null</code>