return nil
	}
	tw := new(tabwriter.Writer).Init(w.w, 0, 5, 5, ' ', 0)
	fmt.Fprintln(tw, strings.Join(secretItemColumns, "\t"))
	for _, s := range secrets {
		if includeConfigType {
			s.Name = fmt.Sprintf("secret/%s", s.Name)
		}
		fmt.Fprintf(tw, "%s\t%s\t%s\t%t\t%s\t%s\t%s\n",
			s.Name, s.Type, s.State, s.Valid, s.SerialNumber, s.NotAfter, s.NotBefore)
	}
	return tw.Flush()
}

		tw = tabwriter.NewWriter(c.Stdout, 0, 8, 1, ' ', 0)
	)

	if len(istioVersion) > 0 {
		fmt.Fprintf(tw, "Istio Version:\t%s\n", istioVersion)
	}
	if len(istioProxySha) > 0 {
		fmt.Fprintf(tw, "Istio Proxy Version:\t%s\n", istioProxySha)
	}
	if len(envoyVersion) > 0 {
		fmt.Fprintf(tw, "Envoy Version:\t%s\n", envoyVersion)
	}

	return tw.Flush()