the name for the option group, this is used to provide help for the options in this group with --help-name
a description for this group to be shown in --help. This string is translated using the translation domain or translation function of the group
a description for the --help-name option. This string is translated using the translation domain or translation function of the group
user data that will be passed to the pre- and post-parse hooks, the error hook and to callbacks of G_OPTION_ARG_CALLBACK options, or NULL
a function that will be called to free user_data, or NULL
ConstructionException GTK+ fails to create the object.
Creates a new GOptionGroup. Since 2.6