This function type is used by gio.vfs.Vfs.registerUriScheme to make it
possible for a client to associate an URI scheme to a different #GFile
implementation.
The client should return a reference to the new file that has been
created for uri, or null to continue with the default implementation.
This function type is used by gio.vfs.Vfs.registerUriScheme to make it possible for a client to associate an URI scheme to a different #GFile implementation.
The client should return a reference to the new file that has been created for uri, or null to continue with the default implementation.