s1.setName("Creasy Bookstore");
s1.setAddress("The Oaks\nDublin");
s1.create(manager);
s1.setAddress("The Lakes\nDublin");
s1.save();
// test change in another session and reload
Store s2 = (Store) manager.getObject(Store.class, s1.getId());
s2.setAddress("");
s2.save();