public function editU3iActivity()
    {
        $request = HttpListener::createFromGlobals();
        $u3i = ($request->get("u3i"));
        $file = JL::open(FEnv::get("framework.config.core.config.file"));
        $file->u3i = $u3i;
        JL::put(FEnv::get("framework.config.core.config.file"), json_encode($file, JSON_PRETTY_PRINT));
        return ((new Renderer())->jsonRenderer(array("code" => 200, "msg" => "OK")));
    }