code: func ParseWorkItemIDToUint64(wiIDStr string) (uint64, error) {
  	wiID, err := strconv.ParseUint(wiIDStr, 10, 64)
  	if err != nil {
  		return 0, errors.NewNotFoundError("work item ID", wiIDStr)
  	}
  	return wiID, nil
  }
docs: // ParseWorkItemIDToUint64 does what it says