Method enable_help

benchmark/cmdparser.hpp:279–285

        }

        void enable_help() {
            set_callback("h", "help", std::function<bool(CallbackArgs&)>([this](CallbackArgs& args){
                args.output << this->usage();
                /*exit(0);*/
                return false;
            }), "", true);
        }

        void disable_help() {
            for (auto command = _commands.begin(); command != _commands.end(); ++command) {