A convenience function which creates a main group if it doesn't exist, adds the @entries to it and sets the translation domain.
a %NULL-terminated array of #GOptionEntrys
a translation domain to use for translating the --help output for the options in @entries with gettext(), or %NULL
2.6
See Implementation
A convenience function which creates a main group if it doesn't exist, adds the @entries to it and sets the translation domain.