Irmin.KV_makerSourceKV_maker is like Maker but uses sensible default implementations for everything except the contents type.
module CA : Content_addressable.Makermodule AW : Atomic_write.Makerinclude Key.Store_spec.S
with type ('h, _) contents_key = 'h
with type 'h node_key = 'h
with type 'h commit_key = 'h