code: func IsValidUUID(uuid string) bool {
  	r := regexp.MustCompile("^[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[[a-fA-F0-9]{4}-[a-fA-F0-9]{12}$")
  	return r.MatchString(uuid)
  }
docs: //IsValidUUID checks if the string is a valid UUID.