code: func validateStackName(namespace string) error {
  	v := strings.TrimFunc(namespace, quotesOrWhitespace)
  	if v == "" {
  		return fmt.Errorf("invalid stack name: %q", namespace)
  	}
  	return nil
  }
docs: // validateStackName checks if the provided string is a valid stack name (namespace).
  // It currently only does a rudimentary check if the string is empty, or consists
  // of only whitespace and quoting characters.