return nil, err
	}

	nsNames := make([]string, len(namespaces.Items))
	for i, ns := range namespaces.Items {
		nsNames[i] = ns.Name
	}
	return nsNames, nil
}

// GetWebhookTagName extracts tag name from webhook object.
func GetWebhookTagName(wh admitv1.MutatingWebhookConfiguration) string {
	return wh.ObjectMeta.Labels[IstioTagLabel]
}

// GetWebhookRevision extracts tag target revision from webhook object.

		fmt.Fprintf(writer, "No Istio revision tag MutatingWebhookConfigurations to list\n")
		return nil
	}
	rawTags := map[uniqTag]tagDescription{}
	for _, wh := range tagWebhooks {
		tagName := GetWebhookTagName(wh)
		tagRevision, err := GetWebhookRevision(wh)
		if err != nil {
			return fmt.Errorf("error parsing revision from webhook %q: %v", wh.Name, err)
		}