code: @Override
      public String marshal( final TemplateModel model ) {
          model.putInSync();
          return this.xt.toXML( model );
      }
docs: /*
  (non-Javadoc)
  @see
  org.drools.ide.common.server.util.RuleModelPersistence#toXML(org.drools.guvnor
  .client.modeldriven.brl.RuleModel)