Our current design is that files that are named in the config group (e.g. "households") is read by ScenarioLoader, but there is no promise that the code will do anything with it.
However, the same is not true for files named in non-core config groups – since the current ScenarioLoader does not know about them.
Would anybody have an idea how this could be overcome? E.g. annotate getters in some way so that `ScenarioLoader` could know about them?
This would also help with path conventions, extending the "relative to config file location" convention to contrib input files.