func InterpretListError(err error, qualifiedResource schema.GroupResource) error {
	switch {
	case storage.IsNotFound(err):
		return errors.NewNotFound(qualifiedResource, "")
	case storage.IsUnreachable(err), storage.IsRequestTimeout(err):
		return errors.NewServerTimeout(qualifiedResource, "list", 2) // TODO: make configurable or handled at a higher level
	case storage.IsInternalError(err):
		return errors.NewInternalError(err)

}

// IsExist returns true if and only if err is "key" already exists error.
func IsExist(err error) bool {
	return isErrCode(err, ErrCodeKeyExists)
}

// IsUnreachable returns true if and only if err indicates the server could not be reached.
func IsUnreachable(err error) bool {
	return isErrCode(err, ErrCodeUnreachable)
}

// IsConflict returns true if and only if err is a write conflict.
func IsConflict(err error) bool {