}
	}
	fmt.Fprintln(c.Stdout, string(out))
	return nil
}

func (c *ConfigWriter) setupListenerConfigWriter() (*tabwriter.Writer, []*listener.Listener, error) {
	listeners, err := c.retrieveSortedListenerSlice()
	if err != nil {
		return nil, nil, err
	}
	w := new(tabwriter.Writer).Init(c.Stdout, 0, 8, 1, ' ', 0)
	return w, listeners, nil
}

	return fmt.Sprintf("no running Istio pods in %q", c.Namespace)
}

var _ error = ControlPlaneNotFoundError{}

type Options struct {
	// MessageWriter is a writer for displaying messages to users.
	MessageWriter io.Writer

	// XdsViaAgents accesses Istiod via the tap service of each agent.
	// This is only used in `proxy-status` command.
	XdsViaAgents bool

For this purpose, we chose to use xDS transport protocol due to our expertise and existing infrastructure, and because the protocol is well suited to our needs.

However, while we chose to use the xDS *transport protocol*, we chose to not use the xDS resource types, such as Clusters and Listeners.

		},
	}

	for i, c := range cases {
		t.Run(fmt.Sprintf("[%v] %v ", i, c.name), func(tt *testing.T) {
			defer func() { recover() }()
			v := &validator{}
			var writer io.Writer
			warn, err := v.validateResource("istio-system", "", fromYAML(c.in), writer)
			if (err == nil) != c.valid {
				tt.Fatalf("unexpected validation result: got %v want %v: err=%v", err == nil, c.valid, err)
			}
			if (warn != nil) != c.warn {

	return b.String()
}

func analyzeTargetAsString() string {
	if allNamespaces {
		return "all namespaces"
	}
	return fmt.Sprintf("namespace: %s", selectedNamespace)
}

// TODO: Refactor output writer so that it is smart enough to know when to output what.
func isJSONorYAMLOutputFormat() bool {
	return msgOutputFormat == formatting.JSONFormat || msgOutputFormat == formatting.YAMLFormat
}

type Client struct {