public static function addStorageWrapper($wrapperName, $wrapper, $priority = 50) {
if (self::$logWarningWhenAddingStorageWrapper&& $wrapperName !== 'readonly') {
if (self::$logWarningWhenAddingStorageWrapper) {
\OC::$server->getLogger()->warning("Storage wrapper '{wrapper}' was not registered via the 'OC_Filesystem - preSetup' hook which could cause potential problems.", [