@Test
    public void testExternalizeBindingVariableLambda() throws Exception {
        String str =
                "package defaultpkg;\n" +
                "import " + Person.class.getCanonicalName() + ";" +
                "global java.util.List list;\n" +
                "rule R when\n" +
                "  $p : Person($n : name == \"Mario\")\n" +
                "then\n" +
                "  list.add($n);\n" +
                "end";

        KieModuleModel kieModuleModel = KieServices.get().newKieModuleModel();
        kieModuleModel.setConfigurationProperty("drools.externaliseCanonicalModelLambda", Boolean.TRUE.toString());

        KieSession ksession = getKieSession(kieModuleModel, str );
        final List<String> list = new ArrayList<>();
        ksession.setGlobal("list", list);

        if (testRunType == RUN_TYPE.FLOW_DSL || testRunType == RUN_TYPE.PATTERN_DSL) {
            RuleImpl rule = (RuleImpl)ksession.getKieBase().getRule("defaultpkg", "R");
            Pattern pattern = (Pattern)rule.getLhs().getChildren().get(0);
            Declaration declaration = pattern.getDeclarations().get("$n");
            LambdaReadAccessor lambdaReadAccessor = (LambdaReadAccessor)declaration.getExtractor();
            Field field = LambdaReadAccessor.class.getDeclaredField("lambda");
            field.setAccessible(true);
            Function1.Impl function1 = (Function1.Impl)field.get(lambdaReadAccessor);
            Object lambda = function1.getLambda();
            assertThat(lambda.getClass().getName(), containsString("LambdaExtractor")); // materialized Lambda
        }

        Person me = new Person( "Mario", 40 );
        ksession.insert( me );
        ksession.fireAllRules();

        Assertions.assertThat(list).containsExactlyInAnyOrder("Mario");
    }