protected function getGoogleMapsUrlOptions()
    {
        if (isset(Yii::$app->params['googleMapsUrlOptions']) && empty($this->googleMapsUrlOptions)) {
            $this->googleMapsUrlOptions = Yii::$app->params['googleMapsUrlOptions'];
        }

        return ArrayHelper::merge([
            'v' => '3.exp',
            'key' => null,
            'libraries' => null,
            'language' => 'en',
        ], $this->googleMapsUrlOptions);
    }