private function _LoadXml() {
        $xml = new \DOMDocument;
        $filename = "APP_ROOT_DIR" . \Puzzlout\Framework\Enums\ApplicationFolderName::AppsFolderName . $this->app->name() . '/Config/menus.xml';
        if (file_exists($filename)) {
            $xml->load($filename);
        } else {
            throw new \Exception("In " . __CLASS__ . "->" . __METHOD__);
        }
        return $xml->getElementsByTagName("main_menu");
    }