public function __construct()
 {
     if (Request::isAjax()) {
         Render::setReply(['reply' => false, 'message' => self::$_content]);
     } else {
         Layout::renderMenu(false);
         Layout::renderFooter(false);
         Layout::loadContent(self::$_content);
         if (!Layout::haveContent()) {
             Layout::putContent(self::$_content);
         }
     }
 }