pkg/io/opener.go
func IsNotExist(err error) bool {
	return os.IsNotExist(err) || err == storage.ErrObjectNotExist
}
func IsNotExist(err error) bool {
	return os.IsNotExist(err) || err == storage.ErrObjectNotExist
}
// IsNotExist will return true if the error is because the object does not exist.