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