Module type State_builder.Array
val set_length : int -> unit
val set : int -> elt -> unit
val iter : ( elt -> unit ) -> unit
val iteri : ( int -> elt -> unit ) -> unit
val fold_left : ( 'a -> elt -> 'a ) -> 'a -> 'a
val fold_right : ( elt -> 'a -> 'a ) -> 'a -> 'a