[Dune] Handling several materials

[HELFER Thomas 202608]

Dear dune users,
I have a naïve question about how I could hande several materials in solid mechanics (with different state variables on each materials).
It looks like the dune-subgrid module and dune-multidomaingrid provide appropriate functionalities.
Would someone confirm that those modules are the way to go ?
If so, is the former still developped ?
Regards,
Thomas

For those who it may concern:

- the website of the pdelab (https://dune-project.org/pdelab/) module is down
- the link to the  dune-subgrid paper (http://www.matheon.de/preprints/5868_graeser_sander_subgrid.pdf) is broken.