Sidebar pointer lifetime (UI-Documentation)

Is this a general concept that needs to be documented or a specific API?
UI -> Sidebar

What concept or API needs more documentation?
I am mostly interested in Sidebar, SidebarWidget and SidebarWidgetType.

Is this documentation related to a specific API?
No, since UI code is not documented at all.

Are there any known examples of people using this API/concept?
The example hellosidebar.py and the headers for all internal sidebars (e.g. StringsViewSidebarWidget)

How i got here
I want to implement a custom sidebar in Rust. I started with writing the python example in C++, which leaves me with a few basic questions:

• Who is responsible for deleting the SidebarWidget* returned in the overload for SidebarWidgetType::createWidget and when is it deleted?
• Who is responsible for deleting the SidebarWidgetType* registered with Sidebar::addSidebarWidgetType() and when is it deleted?
• In General: Who is responsible for the pointers created using the UI-API?

Start with python/examples/hellosidebar.py and the Sidebar, SidebarWidget, and SidebarWidgetType declarations, including the internal sidebar example in ui/stringsview.h. Trace the documented API ownership and destruction behavior for created and registered pointers, then update the relevant UI API documentation so each lifetime question has an explicit answer.