Function Compgen

library/cpp/getopt/small/completer.cpp:154–156

    }

    TString Compgen(TStringBuf flags) {
        return TStringBuilder() << "COMPREPLY+=( $(compgen " << flags << " -- ${cur}) )";
    }

    ICompleterPtr Default() {
        return MakeSimpleShared<TSimpleCompleter>("", "_default");