# Module Ulist

    module Ulist: sig .. end

    type t = (string, string) Stdlib.Hashtbl.t

    val create : int -> ('a, 'b) Stdlib.Hashtbl.t

    val mem : (string, 'a) Stdlib.Hashtbl.t -> string -> bool

    val add : (string, string) Stdlib.Hashtbl.t -> string -> unit

    val addlst : (string, string) Stdlib.Hashtbl.t -> string list -> unit

    val remove : (string, 'a) Stdlib.Hashtbl.t -> string -> unit

    val iter : ('a -> unit) -> ('a, 'b) Stdlib.Hashtbl.t -> unit

    val tolst : ('a, 'b) Stdlib.Hashtbl.t -> 'b list