Swapping out the renderer

Hello,

I'm have a project where I need to be able to handle flexbox-like layouts as part of a map generation process. While I could do that outside of unity, ideally I'd prefer to be able to utilize custom UXML & USS based components, have UIToolkit generate the layout, and then take the final layout tree + style blocks and render them myself. Is there any way to do such a thing with UIToolkit?

Thanks!

EDIT: Never mind - turns out all I need is the OnGeometryChanged event.