code: func (c Calendar) formatDateTimeComponentMinute(datetime time.Time, length int) (string, error) {
  	minute := datetime.Minute()
  
  	switch length {
  	case datetimeFormatLength1Plus:
  		return fmt.Sprintf("%d", minute), nil
  	case datetimeFormatLength2Plus:
  		if minute < 10 {
  			return fmt.Sprintf("0%d", minute), nil
  		}
  		return fmt.Sprintf("%d", minute), nil
  	}
  
  	return "", fmt.Errorf("unsupported minute: %d", length)
  }
docs: // formatDateTimeComponentMinute renders a minute component.