func GetOrDefault(s string, def string) string {
	return pm.GetOrDefault(s, def)
}

// GetProxyConfigNamespace extracts the namespace associated with the proxy
// from the proxy metadata or the proxy ID
func GetProxyConfigNamespace(proxy *Proxy) string {
	if proxy == nil {
		return ""
	}

	// First look for ISTIO_META_CONFIG_NAMESPACE

	if err != nil {
		return nil, status.New(codes.InvalidArgument, err.Error()).Err()
	}
	// Update the config namespace associated with this proxy
	proxy.ConfigNamespace = model.GetProxyConfigNamespace(proxy)
	proxy.XdsNode = node
	return proxy, nil
}

// setTopologyLabels sets locality, cluster, network label
// must be called after `SetWorkloadLabels` and `SetServiceTargets`.