public function thumbnailElement($file_id)
    {
        /** @var LazaretFile $lazaretFile */
        $lazaretFile = $this->getLazaretFileRepository()->find($file_id);

        if (null === $lazaretFile) {
            return new Response(null, 404);
        }

        $lazaretThumbFileName = $this->app['tmp.lazaret.path'].'/'.$lazaretFile->getThumbFilename();

        return $this->deliverFile(
            $lazaretThumbFileName,
            $lazaretFile->getOriginalName(),
            DeliverDataInterface::DISPOSITION_INLINE,
            'image/jpeg'
        );
    }