function modify($tpl, $operatorName, $operatorParameters, $rootNamespace, $currentNamespace, &$operatorValue, $namedParameters)
 {
     switch ($operatorName) {
         case 'json_encode':
             // Lets you use json_encode from templates
             $operatorValue = json_encode($namedParameters['hash']);
             break;
         case 'xml_encode':
             // Lets you use ezjscAjaxContent::xmlEncode from templates
             $operatorValue = ezjscAjaxContent::xmlEncode($namedParameters['hash']);
             break;
         case 'node_encode':
             // Lets you use ezjscAjaxContent::nodeEncode from templates
             $operatorValue = ezjscAjaxContent::nodeEncode($namedParameters['node'], $namedParameters['params'], $namedParameters['type']);
             break;
     }
 }