module Pp:sig..end
val pp_str : Format.formatter -> string -> unitval lst : ('a, Format.formatter, unit) Pervasives.format ->
(Format.formatter -> 'b -> unit) -> Format.formatter -> 'b list -> unitval opt : (Format.formatter -> 'a -> unit) -> Format.formatter -> 'a option -> unitval pp_to_string : (Format.formatter -> 'a) -> string