Function Group

library/cpp/getopt/small/completer.cpp:185–194

    }

    ICompleterPtr Group() {
        // For some reason, OSX freezes when trying to perform completion for groups.
        // You can try removing this ifdef and debugging it, but be prepared to force-shutdown your machine
        // (and possibly reinstall OSX if force-shutdown breaks anything).
#ifdef _darwin_
        return MakeSimpleShared<TSimpleCompleter>("", "");
#else
        return MakeSimpleShared<TSimpleCompleter>(Compgen("-A group"), "_groups");
#endif
    }

    ICompleterPtr Url() {
        return MakeSimpleShared<TSimpleCompleter>("", "_urls");