sig
module Key : Key
type 'a t
type 'a sexpable = 'a t
val sexp_of_t : ('a -> Sexplib.Sexp.t) -> 'a sexpable -> Sexplib.Sexp.t
val t_of_sexp : (Sexplib.Sexp.t -> 'a) -> Sexplib.Sexp.t -> 'a sexpable
val create : int -> 'a Hashtree.S.t
val add : 'a Hashtree.S.t -> key:Hashtree.Key.t -> data:'a -> unit
val remove : 'a Hashtree.S.t -> Hashtree.Key.t -> unit
val find : 'a Hashtree.S.t -> Hashtree.Key.t -> 'a option
val length : 'a Hashtree.S.t -> int
val fold :
'a Hashtree.S.t ->
init:'b -> f:(key:Hashtree.Key.t -> data:'a -> 'b -> 'b) -> 'b
end