module Map: sig .. end
module type S = sig .. end
module Adapt: functor (M : Map.S) -> S with type key = M.key and type 'a map = 'a M.t
Adapt a pre-existing Map module to make it sequence-aware
module Make: functor (V : Map.OrderedType) -> S with type key = V.t
Create an enriched Map module, with sequence-aware functions