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module type S =
sig
type key
type +'a t
val empty: 'a t
val is_empty: 'a t -> bool
val add: key -> 'a -> 'a t -> 'a t
val find: key -> 'a t -> 'a
val remove: key -> 'a t -> 'a t
val mem: key -> 'a t -> bool
val iter: (key -> 'a -> unit) -> 'a t -> unit
val map: ('a -> 'b) -> 'a t -> 'b t
val mapi: (key -> 'a -> 'b) -> 'a t -> 'b t
val fold: (key -> 'a -> 'b -> 'b) -> 'a t -> 'b -> 'b
val compare: ('a -> 'a -> int) -> 'a t -> 'a t -> int
val equal: ('a -> 'a -> bool) -> 'a t -> 'a t -> bool
val fromHash : (key, 'a) Hashtbl.t -> 'a t
val filter : ('a -> bool) -> 'a t -> 'a t
(* values: gives the list of values of the map. *)
val values : 'a t -> 'a list
val fromListWith : ('a -> 'a -> 'a) -> (key * 'a) list -> 'a t
(* Update a value at a specific key with the result of the
provided function. When the key is not a member of the map, the
original map is returned. *)
val adjust : ('a -> 'a) -> key -> 'a t -> 'a t
end
module Make (Ord : Map.OrderedType) : S with type key = Ord.t
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