pass something in the future I'll still returns data that sorry to be worried what happens if I pass a string I get that error so what we are doing is proving how the real world works and how we are doing it we write a little program we run it we see the result so it's a very very fast feedback cycle now you may be when the world why don't you use something like postman to do this right it's just xdp restful must be postman well there's somebody feats of doing it like this way the first thing is you have a full language this is a