Mendix studio can't handle visualizing a recursive element either in an import mapping or in a UI as a snippet that calls itself. However in our domain models we're able to create these self referencing structures.
I would like it to be possible to mark elements as recursive which would then result in Studio pro just rendering at a parent > child depth, but with a marker that it is recursive infinitely.
Yes this comes with the risk of creating very deep / complex structures But unfortunately some mappings or UI's require that.