Breaking: #65305 - DriverInterface has been extended 

See forge#65305

Description 

The getFolderInFolder() and getFileInFolder() functions have been added to DriverInterface.

Impact 

Any FAL driver extension will stop working due to the change in the interface.

Affected Installations 

Any installation with a custom FAL driver, like WebDAV or Dropbox.

Migration 

The functions getFolderInFolder() and getFileInFolder() must be added to the custom FAL driver. A non-hierarchical driver needs to throw a "not implemented" exception when calling these functions.