Support for nesting of Multi/Sub Object Material in Corona Layered Material

See this thread for example: https://forum.corona-renderer.com/index.php?topic=44642.0

It would be very useful to be able to add layers on top of objects that have multi/sub. A car for example. Maybe you want to add dust on top of something that is made out of many parts and that have Multi/Sub.

Or like I just now wanted to render a model with multi/sub with a wire frame on top for showcasing the model. Now I have to comp that in post or make a new version of every material that is in the model.

V-ray has supported this since the dawn of time.