public void test() throws Exception {
Order po = OrderMother.makeOrder();
save(po.getRestaurant());
save(po);
Order detachedOrder = am.detach(po);
detachedOrder.getVersion();
detachedOrder.noteSent("msgid", new Date());
detachedOrder.accept("x");
Order attachedOrder = am.attach(detachedOrder);
assertFalse(attachedOrder.isAcknowledgable());
}