code: func (u *UUID) UnmarshalJSON(b []byte) error {
  	var s string
  	if err := json.Unmarshal(b, &s); err != nil {
  		return err
  	}
  
  	new, err := ParseUUID(s)
  	if err == nil {
  		u.UUID = new.UUID
  	}
  	return err
  }
docs: // UnmarshalJSON unmarshals the raw JSON into the UUID.