Imbo\Storage\S3::getLastModified PHP Метод

    public function getLastModified($user, $imageIdentifier)
    {
        try {
            $model = $this->getClient()->headObject(['Bucket' => $this->params['bucket'], 'Key' => $this->getImagePath($user, $imageIdentifier)]);
        } catch (NoSuchKeyException $e) {
            throw new StorageException('File not found', 404);
        }
        return new DateTime($model->get('LastModified'), new DateTimeZone('UTC'));
    }