code: func GenerateRandomName(prefix string, size int) (string, error) {
  	id := make([]byte, 32)
  	if _, err := io.ReadFull(rand.Reader, id); err != nil {
  		return "", err
  	}
  	return prefix + hex.EncodeToString(id)[:size], nil
  }
docs: // GenerateRandomName returns a new name joined with a prefix.  This size
  // specified is used to truncate the randomly generated value