when:
        Class<?> generatedClass = readOnlyManagedClass(type)

        then:
        failWhenRealized generatedClass, "has non managed type ${type.name}, only managed types can be used"

        where:
        type << JDK_SCALAR_TYPES
    }

    Class<?> readOnlyManagedClass(Class<?> type) {
        String typeName = type.getSimpleName()