code: public ConfigOptionBuilder setCommandLineOptionWithArgument( CommandLineOption commandLineOption, StringConverter converter ) {
          co.setCommandLineOption( commandLineOption );
          return setStringConverter( converter );
      }
docs: if you want to parse an argument, you need a converter from String to Object
  
  @param commandLineOption specification of the command line options
  @param converter how to convert your String value to a castable Object