UI_Listbox Header on Jeremie Leroy's Custom UI

Has anyone played with UI_Listbox header of Jeremie Leroy’s Custom UI?

I mean in the webpage of the creator, it only say’s how to apply the Custom_UI to your project
but it lacks of manuals or examples, like the Christian MBS Monkeybread Plugins, that have a great job making examples of use
and manuals for how to use it each plugin.