How to make gracefulStop waiting? about go-zero HOT 8 OPEN

func signalHandler() {
	// signal handler
	c := make(chan os.Signal, 1)
	signal.Notify(c, syscall.SIGHUP, syscall.SIGQUIT, syscall.SIGTERM, syscall.SIGINT)
	for {
		s := <-c
		switch s {
		case syscall.SIGQUIT, syscall.SIGTERM, syscall.SIGINT:
			// do what you want
			return
		case syscall.SIGHUP:
		default:
			return
		}
	}
}

func init() {
	go func() {
		// https://golang.org/pkg/os/signal/#Notify
		signals := make(chan os.Signal, 1)
		signal.Notify(signals, syscall.SIGUSR1, syscall.SIGUSR2, syscall.SIGTERM, syscall.SIGINT)

		for {
			v := <-signals
			switch v {
			case syscall.SIGUSR1:
				dumpGoroutines(fileCreator{})
			case syscall.SIGUSR2:
				profiler := StartProfile()
				time.AfterFunc(profileDuration, profiler.Stop)
			case syscall.SIGTERM:
				stopOnSignal()
				gracefulStop(signals, syscall.SIGTERM)
			case syscall.SIGINT:
				stopOnSignal()
				gracefulStop(signals, syscall.SIGINT)
			default:
				logx.Error("Got unregistered signal:", v)
			}
		}
	}()
}

waitForCalled := proc.AddWrapUpListener(func() {
	fmt.Println("wrap up start...")
	time.Sleep(5 * time.Second)
	fmt.Println("wrap up done")
})
waitForCalled()