code: func (t *TimerGroup) String() string {
  	timers := byCreationTimeSorter{}
  	for _, timer := range t.timers {
  		timers.Timers = append(timers.Timers, timer)
  	}
  	sort.Sort(timers)
  	result := &bytes.Buffer{}
  	for _, timer := range timers.Timers {
  		fmt.Fprintf(result, "%s\n", timer)
  	}
  	return result.String()
  }
docs: // Return a string representation of a TimerGroup.