Pimcore\Model\Asset\Document::getImageThumbnail PHP Метод

    public function getImageThumbnail($thumbnailName, $page = 1, $deferred = false)
    {
        if (!\Pimcore\Document::isAvailable()) {
            Logger::error("Couldn't create image-thumbnail of document " . $this->getRealFullPath() . " no document adapter is available");
            return new Document\ImageThumbnail(null);
        }
        return new Document\ImageThumbnail($this, $thumbnailName, $page, $deferred);
    }