Scv and Scvf do not need to store any corners and/or geometries. The geometry can be computed on-the-fly given an element geometry. We could provide such a feature in the element geometries. Since I assume that this is a hardly used feature, and all occurrences in Dumux (can be counted on one hand) can use a replacement, I suggest to remove these interfaces without deprecation. The benefit is much less memory usage when caching the scv/scvfs. The proposed interface is two free functions `auto geometry(fvElementGeometry, scv)` `auto geometry(fvElementGeometry, scvf)` Alternatively, we can think about `auto geometry(element_geometry, scv)` `auto geometry(element_geometry, scvf)` then all local Dune index information has to be available from the scv/scvf object, while the first version allows to do some additional mapping only known to the `fvElementGeometry` implementation.