code: func (apigError *Error) Error() string {
  	bytes, bytesErr := json.Marshal(apigError)
  	if bytesErr != nil {
  		bytes = []byte(http.StatusText(http.StatusInternalServerError))
  	}
  	return string(bytes)
  }
docs: // Error returns the JSONified version of this error which will
  // trigger the appropriate integration mapping.