App\Http\Controllers\EditorController::setting PHP Method

    public function setting(EditorHandler $handler, Request $request, $instanceId)
    {
        $editorId = $request->get('editorId');
        if (empty($editorId)) {
            $editorId = null;
        }
        $handler->setInstance($instanceId, $editorId);
        if (!($url = XeMenu::getInstanceSettingURIByItemId($instanceId))) {
            return redirect()->back();
        } else {
            return redirect($url);
        }
    }