m, _, err := unstructured.NestedStringMap(template, "metadata", "labels")
			if err != nil {
				return nil, err
			}
			return m, nil
		}
	}
	return nil, nil
}

func (v *validator) validateFile(path string, istioNamespace *string, defaultNamespace string, reader io.Reader, writer io.Writer,
) (validation.Warning, error) {
	yamlReader := kubeyaml.NewYAMLReader(bufio.NewReader(reader))
	var errs error