docs: public Object unmarshalMessage(String xml)
      {
          try {
              IBindingFactory jc = BindingDirectory.getFactory(Model.class);
              IUnmarshallingContext unmarshaller = jc.createUnmarshallingContext();
              Reader inStream = new StringReader(xml);
              Object message = unmarshaller.unmarshalDocument( inStream, BINDING_NAME);
              return message;
          } catch (JiBXException e) {
              e.printStackTrace();
          }
          return null;
      }