Does anyone have any examples on how to use UI Toolkit TabView?

I am trying to find an example on how to use TabButton and TabbedView custom visual elements in UI-Toolkit, I have search every ware and can not find any examples on how to use or create my custom tab system. Would appreciate if some one could help me with a simple tab system for UI toolkit.

TabButton and TabbedView are both internal classes, you cant use them. Are you thinking of TabView?
There are examples in the Editor, go to Window/UI Toolkit/Samples.