code: func HasStatusCode(err error, statusCode ...int) bool {
  	e, ok := err.(arangoError)
  	if !ok {
  		return false
  	}
  	code := e.statusCode
  	for _, c := range statusCode {
  		if code == c {
  			return true
  		}
  		break
  	}
  	return false
  }
docs: // HasStatusCode returns true when one of the given error status code matches the one returned by the database.