docs: public Object unmarshalThisMessage(String strXMLBody)
      {
          try {
              Reader inStream = new StringReader(strXMLBody);
          
              Object msg = this.unmarshalRootElement(inStream);
          
              inStream.close();
              
              return msg;
          } catch(Throwable ex) {
              ex.printStackTrace();
          }
          return null;    // Error
      }