`sig
type el
type t
val name : string
val length : Nopres_impl.Implementation.t -> int
val create : int -> Nopres_impl.Implementation.t
val make :
int -> Nopres_impl.Implementation.el -> Nopres_impl.Implementation.t
val unsafe_get :
Nopres_impl.Implementation.t -> int -> Nopres_impl.Implementation.el
val unsafe_set :
Nopres_impl.Implementation.t ->
int -> Nopres_impl.Implementation.el -> unit
val unsafe_blit :
Nopres_impl.Implementation.t ->
int -> Nopres_impl.Implementation.t -> int -> int -> unit
end`