public function getExportStorageService($default = null)
    {
        $storage = array_get($this->manifest, 'storage', $default);

        if (is_array($storage)) {
            $name = array_get($storage, 'name', array_get($storage, 'id', $default));
            if (is_numeric($name)) {
                return ServiceManager::getServiceNameById($name);
            }

            return $name;
        }

        return $storage;
    }