Can I set NSURLIsExcludedFromBackupKey on my whole AppGroup?

Hi, im using an app group to communicate between app and extensions. I dont want any part of the AppGroup to be backed up to iCloud/iTunes: The data shouldn't be purgable on update of app but it should also stay on device

Can I apply NSURLIsExcludedFromBackupKey to the app group's root folder I get from [fileManager containerURLForSecurityApplicationGroupIdentifier:appGroupIdentifier];