`object
method add : 'a Config_file.cp -> unit
method command_line_args :
section_separator:string -> (string * Arg.spec * string) list
method read :
?obsoletes:string ->
?no_default:bool ->
?on_type_error:(Config_file.groupable_cp ->
Config_file.Raw.cp ->
(Pervasives.out_channel -> unit) ->
string -> Pervasives.in_channel -> unit) ->
string -> unit
method write : ?with_help:bool -> string -> unit
end`