pendalf89\filemanager\models\Mediafile::getThumbImage PHP Method

    public function getThumbImage($alias, $options = [])
    {
        $url = $this->getThumbUrl($alias);
        if (empty($url)) {
            return '';
        }
        if (empty($options['alt'])) {
            $options['alt'] = $this->alt;
        }
        return Html::img($url, $options);
    }