module Hashtbl: sig .. end
type ('a, 'b) t = ('a, 'b) Hashtbl.t
val create : int -> ('a, 'b) t
val clear : ('a, 'b) t -> unit
val add : ('a, 'b) t -> key:'a -> data:'b -> unit
val copy : ('a, 'b) t -> ('a, 'b) t
val find : ('a, 'b) t -> 'a -> 'b
val find_all : ('a, 'b) t -> 'a -> 'b list
val mem : ('a, 'b) t -> 'a -> bool
val remove : ('a, 'b) t -> 'a -> unit
val replace : ('a, 'b) t -> key:'a -> data:'b -> unit
val iter : f:(key:'a -> data:'b -> unit) -> ('a, 'b) t -> unit
val fold : f:(key:'a -> data:'b -> 'c -> 'c) ->
('a, 'b) t -> init:'c -> 'c
val length : ('a, 'b) t -> int
module type HashedType = Hashtbl.HashedType
module type S = sig .. end
module Make:
val hash : 'a -> int
val hash_param : int -> int -> 'a -> int