While doing more research on wild cherry I come upon some stuff that said the wild cherry leaves can be used madicinally. Is this true and if so what and how are the leaves used?

Also can any part of the bark from the wild cherry tree be used madicinally or just the inner bark?

Could one make a strong water unfusion with the twigs of the wild chery tree and still get the madicinal uses out of it like they would by using the trunk bark?

I keep seeing conflicting info on wild cherry. Some says to only use the bark of the older trees while others say to only use the younger trees. Which is it or does it matter?