the #GAsyncResult passed to your #GAsyncReadyCallback
the number of bytes of disk space used
the number of directories encountered
the number of non-directories encountered
true if successful, with the out parameters set. false otherwise, with error set.
Collects the results from an earlier call to gio.file.File.measureDiskUsageAsync. See gio.file.File.measureDiskUsage for more information.