Return id of created folder in mkcol request

It would be great if webdav `mkcol` requests could return the id of the newly created folder. A webdav `PUT` request e.g. returns the file id as a header `Oc-Fileid`. Can we have the same or similar for `mkcol`s?

This is needed for the web client to immediately fetch a newly created folder when working with id-based requests.