public function getResizeUrl($image, $width, $height = null, $format = 'jpg', $seo = null, $seoLanguage = 'de')
    {
        $imageObject = $this->getImageObject($image);
        if (null !== $height) {
            $heightString = "-height-$height";
        } else {
            $heightString = '';
        }
        $stack = "dynamic/resize-width-$width$heightString--options-autoformat-true-jpg.transparency.autoformat-true";

        return $this->getStackUrl($imageObject, $stack, $format, $seo, $seoLanguage);
    }