g_simple_async_result_set_op_res_gpointer (simple, NULL, NULL);
g_simple_async_result_complete_in_idle (simple);
g_object_unref (simple);
g_simple_async_result_set_op_res_gpointer (simple, NULL, NULL);
g_simple_async_result_complete_in_idle (simple);
g_object_unref (simple);