Make.BackendBackend functions, which might be used by the backends.
module Schema = SchemaA store schema, meant to be provided by the user.
module Hash = HashHashing implementation.
module Contents : sig ... endA contents store.
module Node : sig ... endA node store.
A node abstraction that is portable from different repos. Similar to Node.Val.
module Commit : sig ... endA commit store.
A commit abstraction that is portable from different repos. Similar to Commit.Val.
module Branch : sig ... endA branch store.
module Slice : sig ... endA slice abstraction.
module Repo : sig ... endA repo abstraction.
module Remote : sig ... endURI-based low-level remote synchronisation.