type t = (string, string) Hashtbl.t
val create : int -> ('a, 'b) Hashtbl.t
val mem : (string, 'a) Hashtbl.t -> string -> bool
val add : (string, string) Hashtbl.t -> string -> unit
val addlst : (string, string) Hashtbl.t -> string list -> unit
val remove : (string, 'a) Hashtbl.t -> string -> unit
val iter : ('a -> unit) -> ('a, 'b) Hashtbl.t -> unit
val tolst : ('a, 'b) Hashtbl.t -> 'b list