Sets the parameter string to be used by the commandline handling of application.
This function registers the argument to be passed to glib.option_context.OptionContext.new_ when the internal #GOptionContext of application is created.
See glib.option_context.OptionContext.new_ for more information about parameter_string.
a string which is displayed in the first line of --help output, after the usage summary programname [OPTION...].
Sets the parameter string to be used by the commandline handling of application.
This function registers the argument to be passed to glib.option_context.OptionContext.new_ when the internal #GOptionContext of application is created.
See glib.option_context.OptionContext.new_ for more information about parameter_string.