/**
* Check whether the given storage is available / valid.
*
* Note that this operation can be time consuming depending
* on whether the remote storage is available or not.
*
* @param StorageConfig $storage storage configuration
*/
protected function updateStorageStatus(StorageConfig &$storage)
{
// update status (can be time-consuming)
$storage->setStatus(\OC_Mount_Config::getBackendStatus($storage->getBackendClass(), $storage->getBackendOptions(), false));
}