Hello, I think it might be useful to have a property in TableTree Rows to control if it is expanded or not. Perhaps a property like isExpanded and corresponding event function onExpand.
My use-case is that I want to know if the menu is expanded, so I can do some sizing on a component that is rendering in the background. In my case the TableTree menu is floating over a map. If the TableTree is expanded, I want to zoom-in/fit my map while taking this into account.