when:
        TestUtil.objectFactory().newInstance(MyNamedDomainObjectCollection).named { !it.isEmpty() }

        then:
        UnsupportedOperationException e = thrown()
        e.getMessage() == "Method not implemented by org.gradle.api.internal.MyNamedDomainObjectCollection"
    }

}

class MyNamedDomainObjectCollection<T> implements NamedDomainObjectCollection<T> {
    @Override