It’s in line 150
It was used to store the ptr to the currently focused widget. For example, when I’m hovering a Widget with the mouse, it tells the UISystem to set this Widget into focus.
I thought I’ll make it a UPROPERTY because some pointers are garbage collected after 2 minutes ingame. In this case the reference cant be lost because the ptr is provided from outside this class, but I did it just in case.