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func createConfig(kubeClient kube.CLIClient, wg *clientnetworking.WorkloadGroup, istioNamespace, clusterID, ingressIP, internalIP,
	externalIP string, outputDir string, out io.Writer,
) error {
	if err := os.MkdirAll(outputDir, filePerms); err != nil {
		return err
	}
	var (
		err         error
		proxyConfig *meshconfig.ProxyConfig
	)
	revision := kubeClient.Revision()