Sourceval line_at : int -> t -> string Sourceval fold_left : ('a -> string -> 'a) -> 'a -> t -> 'a Sourceval fold_right : (string -> 'a -> 'a) -> t -> 'a -> 'a Sourceval iter : (string -> unit) -> t -> unit Sourceval iteri : (int -> string -> unit) -> t -> unit Sourceval prefix_string : int -> string -> string Sourceval suffix_string : int -> string -> string