var mutex = &sync.Mutex{}
var wg sync.WaitGroup

func generateMessage(message string) {
  //...

	wg.Add(1)
	go func() {
		defer wg.Done()
		printMessage(message)
	} ()

	wg.Wait()
}

func printMessage(resultMessage string) {
	mutex.Lock()
	defer mutex.Unlock()

  // Internal Logic : Ignore
	if IsTimeEnabled {
		log.Println(resultMessage)
		return
	}
	fmt.Println(resultMessage)
}