public static String bar(Integer n, int k) {
        log.info("bar called");
        return "do bar n:" + n + ", k=" + k;
    }
    public static String baz(Integer n, int k) {
        return "do baz";
    }

        ByteBuddyAgent.install();

        Method bar = App.class.getDeclaredMethod("bar", Integer.class, int.class);
        //Method baz = App.class.getDeclaredMethod("baz");

        new ByteBuddy()
            .redefine(Simple.class)
            .method(named("tell"))
            //.intercept(MethodDelegation.to(new TimingInterceptor()))
            //.intercept(FixedValue.value("Hello Foo Redefined"))
            .intercept(
                MethodCall.invoke(bar)                 // call bar()...
                //.andThen(MethodCall.invoke(baz))  // ... .length()?
                .withAllArguments()
            )
            .make()
            .load(
                Simple.class.getClassLoader(), 
                ClassReloadingStrategy.fromInstalledAgent()
            );

        Simple simple = new Simple();
        String ret = simple.tell(1, 2);
        log.info("app finish: {}", ret);