module type Tbl =sig..end
module T:sig..end
include Hashtbl.S
val to_list : 'a t -> (T.t * 'a) list
val of_list : (T.t * 'a) list -> 'a t
val to_map : 'a t -> 'a Stdlib.Map.Make(T).t
val of_map : 'a Stdlib.Map.Make(T).t -> 'a t
val memoize : 'a t -> (key -> 'a) -> key -> 'a
val map : 'a t -> ('a -> 'b) -> 'b t