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

        return ArrayHelper::merge([
            'mapTypeId' => 'roadmap',
            'tilt' => 45,
            'zoom' => 2,
        ], $this->googleMapsOptions);
    }