code: func (u *User) GetAvatarByLabel(label string) (avatar Avatar, err error) {
  	for _, avatar = range u.Avatars {
  		if avatar.Label == label {
  			return
  		}
  	}
  	err = errors.New("Could not find Avatar with Label " + label)
  	return
  }
docs: // GetAvatarByLabel gets the avatar associated with this label