val level : int Stdlib.refval dprintf : int -> ('a, Stdlib.Format.formatter, unit) Stdlib.format -> 'aval eprintf : ('a, Stdlib.Format.formatter, unit) Stdlib.format -> 'aval raw_dprintf : int -> ('a, Stdlib.Format.formatter, unit) Stdlib.format -> 'aval classic_display : bool Stdlib.refval event : ?pretend:bool -> string -> string -> Tags.t -> unitval display : (Stdlib.out_channel -> unit) -> unit