code: func (t *TimerGroup) GetTimer(name fmt.Stringer) *Timer {
  	if timer, exists := t.timers[name]; exists {
  		return timer
  	}
  	timer := &Timer{
  		name:    name,
  		created: time.Now(),
  	}
  	t.timers[name] = timer
  	return timer
  }
docs: // GetTimer gets (and creates, if necessary) the Timer for a given code section.