code: func NewGone(message string) error {
  	return &StatusError{unversioned.Status{
  		Status:  unversioned.StatusFailure,
  		Code:    http.StatusGone,
  		Reason:  unversioned.StatusReasonGone,
  		Message: message,
  	}}
  }
docs: // NewGone returns an error indicating the item no longer available at the server and no forwarding address is known.