code: func DefaultMetaV1FieldSelectorConversion(label, value string) (string, string, error) {
  	switch label {
  	case "metadata.name":
  		return label, value, nil
  	case "metadata.namespace":
  		return label, value, nil
  	default:
  		return "", "", fmt.Errorf("%q is not a known field selector: only %q, %q", label, "metadata.name", "metadata.namespace")
  	}
  }
docs: // DefaultMetaV1FieldSelectorConversion auto-accepts metav1 values for name and namespace.
  // A cluster scoped resource specifying namespace empty works fine and specifying a particular
  // namespace will return no results, as expected.