`sig type 'a t val empty : 'a BatVect.RANDOMACCESS.t val get : 'a BatVect.RANDOMACCESS.t -> int -> 'a val unsafe_get : 'a BatVect.RANDOMACCESS.t -> int -> 'a val set : 'a BatVect.RANDOMACCESS.t -> int -> 'a -> unit val unsafe_set : 'a BatVect.RANDOMACCESS.t -> int -> 'a -> unit val append : 'a BatVect.RANDOMACCESS.t -> 'a BatVect.RANDOMACCESS.t -> 'a BatVect.RANDOMACCESS.t val concat : 'a BatVect.RANDOMACCESS.t list -> 'a BatVect.RANDOMACCESS.t val length : 'a BatVect.RANDOMACCESS.t -> int val copy : 'a BatVect.RANDOMACCESS.t -> 'a BatVect.RANDOMACCESS.t val sub : 'a BatVect.RANDOMACCESS.t -> int -> int -> 'a BatVect.RANDOMACCESS.t val make : int -> 'a -> 'a BatVect.RANDOMACCESS.t val iter : ('a -> unit) -> 'a BatVect.RANDOMACCESS.t -> unit val map : ('a -> 'b) -> 'a BatVect.RANDOMACCESS.t -> 'b BatVect.RANDOMACCESS.t val fold_right : ('a -> 'b -> 'b) -> 'a BatVect.RANDOMACCESS.t -> 'b -> 'b val enum : 'a BatVect.RANDOMACCESS.t -> 'a BatEnum.t val backwards : 'a BatVect.RANDOMACCESS.t -> 'a BatEnum.t val of_enum : 'a BatEnum.t -> 'a BatVect.RANDOMACCESS.t val of_backwards : 'a BatEnum.t -> 'a BatVect.RANDOMACCESS.t end`