How to listen to messenger websockets events?

[wezabronsz]

Hi not very much related to this project, but related to messenger. There's no many projects like this on github or even if exists are at least 7 years old. This one is pretty new compared to them. I saw intuitiveexplanations post about this tool, for sure it's outdated as author said, but in the blog for me is missing very important example. Of subscribing and listening a to messenger websockets events. If somebody here would share any examples I'll be grateful. I'm very beginningwith websockets and messenger api