Comment by nine_k

Indeed, they hid source code samples a bit too deep.

Easiest I could find is to go to tutorials in the menu, for instance, [1]. Such pages have links to actual source files which live on GitHub, like [2].

[1]: https://p-org.github.io/P/tutorial/clientserver/ [2]: https://github.com/p-org/P/tree/master/Tutorial/1_ClientServ...