Module Wprop.Indexed2.P

module P: Datatype.Pair_with_collections(Key1)(Key2)(sig
val module_name : string
end)

include Datatype.S
module Set: Datatype.Set  with type elt = t
module Map: Datatype.Map  with type key = t
module Hashtbl: Datatype.Hashtbl  with type key = t