+void g_file_query_filesystem_info_async (GFile *file,
+ const char *attributes,
+ int io_priority,
+ GCancellable *cancellable,
+ GAsyncReadyCallback callback,
+ gpointer user_data);
+GFileInfo * g_file_query_filesystem_info_finish (GFile *file,
+ GAsyncResult *res,
+ GError **error);