This is completly outdated

[bunnyhu]

Guys, this example is far different from the tutorial or even from the readme.md. If I put into the WP and enabled, I got messages from divi:
"This third party module is not fully compatible with the latest version of the Divi Builder. You can still edit the module, but a preview will not be rendered in the builder. You can contact the developer of the module to encourage them to update it. Click here for more info."

This tutorial is simple not working, that github repo is not avaiable.
https://www.elegantthemes.com/documentation/developers/create-divi-extension/

This tutorial also outdated:
https://www.elegantthemes.com/documentation/developers/how-to-create-a-divi-builder-module/

This is a paid stuff, can you please spend a little bit more time to make is useful? Please update the tutorial and etc.