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module ID : sig
  (** [t] is a ID within a range *)
  type t

  val create : int -> t
  (** [create num] is an ID [t] *)

  val validate : (t -> bool) list -> t -> bool
  (** [validate rules id] is [true] if the [id] passes all rule checks *)

  val incr : t -> t
  (** [incr id] is the next [id] in the sequence *)

  val to_int : t -> int
  (** [to_int id] is an integer representation of [id] *)

  val to_string : t -> string
  (** [to_string id] is an string representation of [id] *)

  val pp : t -> string
  (** [pp id] is a pretty string representing [id] *)
end