@Override
protected void initialize() throws Exception {
    putFunction("printHelloWorld", new TextFunction("Hello World", () -> {
        System.out.println("Hello, World !");
    }));
    putFunction("printGoodMorning", new TextFunction("Good morning", () -> {
        System.out.println("Good morning !");
    }));
    putFunction("printGoodNight", new TextFunction("Good night", () -> {
        System.out.println("Good night !");
    }));
}