+/**
+ * RefreshAsyncUserCallback:
+ *
+ * @obj: a #GObject generic object which has created current mail operation.
+ * @folder: a #TnyFolder which has been refreshed .
+ * @user_data: generic data passed to user defined function.
+ *
+ * This function will be called after refresh_folder_async_cb private function, which is
+ * used as tinymail operation callback. The private function fills private
+ * fields of mail operation and calls user defined callback if it exists.
+ */
+typedef void (*RefreshAsyncUserCallback) (const GObject *obj,
+ TnyFolder *folder,
+ gpointer user_data);
+