public function createCallbackUrl($callback)
    {
        return Url::to([
            '/admin/'.$this->model->ngRestApiEndpoint().'/active-window-callback',
            'activeWindowCallback' => Inflector::camel2id($callback),
            'ngrestConfigHash' => $this->getConfigHash(),
            'activeWindowHash' => $this->getActiveWindowHash(),
        ], true);
    }