But that’s the thing, they managed to do it in such a way that it requires barely any language change: just imagine an implicit `public class X {` at the top of

But that’s the thing, they managed to do it in such a way that it requires barely any language change: just imagine an implicit `public class X {` at the top of the file and a closing } at the end. And now just change the default class loader to be less restrictive in finding main methods, and that’s it. While it really does help teaching people when you can be more focused on the relevant parts only.