Comment by bkirwi

1) Ah, the ValuePipe is (relatively) new; thanks for the pointer. 2) You have to explicitly `.group` in Scoobi as well; it transforms a DList[(K,V)] to a DList[(K, Iterable[V])] or similar. You don't have to call `.toTypedPype` to get map and friends, though, since it's just a DList. 3) I've actually written this exact integration, so I'm glad it's the approved method! The global, mutable Mode made me nervous, IIRC.