{
AddonRegistry registry = LocalServices.getFurnace(getClass().getClassLoader())
.getAddonRegistry();
Imported<ConcreteC> imported = registry.getServices(ConcreteC.class);
ConcreteC c = imported.get();
Assert.assertNotNull(c);
String payload = "PAYLOAD";
c.setPayload(payload);
Assert.assertEquals(payload, c.getPayload());
Assert.assertEquals(payload.toString(), c.toString());
}