While you can still use the addTab from the parent class, *strongly* recommend you use addPage insteaad.
See Implementation
Added December 24, 2021 to fulful the interface requirement that came from adding TabMessageWidget.
You should not use it though since the addPage function is much easier to use here.
While you can still use the addTab from the parent class, *strongly* recommend you use addPage insteaad.