final public static function css(array $params)
    {
        return ("<link href='".FEnv::get("host.web.components.apps").
            strtolower(FEnv::get("framework.env"))."/".strtolower(FEnv::get("app.call"))."/".
            ((isset($params['path']))? $params['path']."." : "")."css' rel='stylesheet' />");
    }