}

    interface SomeMap extends ModelMap<List<String>> {
    }

    def "specialized map"() {
        expect:
        def schema = extract(SomeMap)
        assert schema instanceof SpecializedMapSchema
        schema.elementType == new ModelType<List<String>>() {}
        schema.implementationType
    }

    private void fail(extractType, errorType, String msgPattern) {
        try {