public static function getTemplatePath(){
        if(empty(self::$templatesPath)){
            $dir = \common_ext_ExtensionsManager::singleton()->getExtensionById('taoQtiItem')->getDir();
            self::$templatesPath = $dir.'model/qti/templates/';
        }
        $returnValue = self::$templatesPath;

        return (string) $returnValue;
    }