Parameter Make.Memory_table
val create : entry_type:string -> ?random:bool -> int -> 'a t
val find : 'a t -> Hash.t -> 'a option
val add : 'a t -> Hash.t -> 'a -> unit
val replace : 'a t -> Hash.t -> 'a -> unit
val remove : 'a t -> Hash.t -> unit
val fold : (Hash.t -> 'a -> 'b -> 'b) -> 'a t -> 'b -> 'b