`val success : bool OptParse.Opt.t`
`val failure : bool OptParse.Opt.t`
`val explain : bool OptParse.Opt.t`
`val minimal : bool OptParse.Opt.t`
`val condense : bool OptParse.Opt.t`
`val summary : bool OptParse.Opt.t`
`val default_options : string list`
`val group : OptParse.OptParser.group option Stdlib.ref`
`val descr : string`
`val add_options : ?default:string list -> OptParse.OptParser.t -> unit`
`val add_option : ?short_name:char -> ?long_name:string -> ?help:string -> OptParse.OptParser.t -> ?hide:bool -> ?short_names:char list -> ?long_names:string list -> 'a OptParse.Opt.t -> unit`