Bean bean = newInstance(Bean.class);
        assertTrue(bean instanceof GeneratedSubclass);
        assertEquals(Bean.class, ((GeneratedSubclass) bean).publicType());
        assertEquals(Bean.class, GeneratedSubclasses.unpackType(bean));
        assertEquals(Bean.class, GeneratedSubclasses.unpack(bean.getClass()));
    }

    @Test

        def copy = managedFactory().fromState(property.publicType(), state)
        !copy.is(property)
        !copy.present
        copy.getOrNull() == null

        property.set(someValue())
        copy.getOrNull() == null

        def state2 = property.unpackState()
        def copy2 = managedFactory().fromState(property.publicType(), state2)
        !copy2.is(property)

    }

    protected void addToContainer(T element) {
        container.add(element)
    }

    Class<? extends DomainObjectCollection<T>> getContainerPublicType() {
        return new DslObject(container).publicType.concreteClass
    }

    def setup() {
        // Verify some assumptions
        assert !type.isAssignableFrom(otherType) && !otherType.isAssignableFrom(type)
        assert type.isInstance(a)