How can we make LibUI.window_set_position(main_window, 2, 2) work?

[rubyFeedback]

It seems that this line does not work:

https://github.com/kojix2/LibUI/blob/main/examples2/window.rb#L110

I get a segfault instead if I leave it not commented out.

Should it not instead move the window to the specified position, according
to this documentation here:

https://libui.dev/structui_window.html#ac93ed7a6f98734d86caa411eee4f84a6

Edit: Interestingly I tried with python-libui just now, and it has no such SetPosition
function either. I am still confused why it is mentioned in the API reference though.