module type HASHTBL = sig .. end
sig
end
include Datatype.HASHTBL
val clear : 'a t -> unit
'a t -> unit
val find : 'a t -> key -> 'a
'a t -> key -> 'a
val remove : 'a t -> key -> unit
'a t -> key -> unit
val mem : 'a t -> key -> bool
'a t -> key -> bool