mc, err := mesh.ApplyProxyConfig("drainDuration: 5s", config)
		if err != nil {
			t.Fatal(err)
		}
		// Ensure we didn't modify the passed in mesh config
		if mc.DefaultConfig.DiscoveryAddress != defaultDiscovery {
			t.Fatalf("expected discoveryAddress: %q, got %q", defaultDiscovery, mc.DefaultConfig.DiscoveryAddress)
		}
		if mc.DefaultConfig.DrainDuration.Seconds != 5 {

		if x.ServiceCluster == defaults.GetClusterName().(*meshconfig.ProxyConfig_ServiceCluster).ServiceCluster {
			pc.ClusterName = nil
		}
	}

	if proto.Equal(pc.DrainDuration, defaults.DrainDuration) {
		pc.DrainDuration = nil
	}
	if proto.Equal(pc.TerminationDrainDuration, defaults.TerminationDrainDuration) {
		pc.TerminationDrainDuration = nil
	}
	if pc.DiscoveryAddress == defaults.DiscoveryAddress {

		TracingServiceName *v1alpha13.ProxyConfig_TracingServiceName_ `json:"tracingServiceName,omitempty"`
	}
)

type proxyConfig struct {
	DrainDuration                  *durationpb.Duration                    `json:"drainDuration" patchStrategy:"replace"`
	DiscoveryRefreshDelay          *durationpb.Duration                    `json:"discoveryRefreshDelay" patchStrategy:"replace"`

  },
  "layered_runtime": {
      "layers": [
          {
            "name": "global config",

accessLogFile: /dev/stdout
accessLogFormat: ""
defaultConfig:
  concurrency: 2
  configPath: ./etc/istio/proxy
  connectTimeout: 10s
  controlPlaneAuthPolicy: NONE
  discoveryAddress: istiod.istio-system.svc:15012
  drainDuration: 45s
  parentShutdownDuration: 1m0s
  proxyAdminPort: 15000
  proxyMetadata:
    DNS_AGENT: ""
  serviceCluster: istio-proxy
  tracing:
    zipkin:
      address: zipkin.istio-system:9411

  },
  "layered_runtime": {
      "layers": [
          {

  },
  "layered_runtime": {
      "layers": [
          {
            "name": "global config",

  },
  "layered_runtime": {
      "layers": [
          {
            "name": "global config",

NAME":"svc-0-0-0-6944fb884d-4pgx8","PROXY_CONFIG":{"binaryPath":"/usr/local/bin/envoy","configPath":"/tmp/bootstrap/runningsds","controlPlaneAuthPolicy":"MUTUAL_TLS","customConfigFile":"envoy_bootstrap.json","discoveryAddress":"mypilot:1001","drainDuration":"5s","proxyAdminPort":15005,"serviceCluster":"istio-proxy","statNameLength":200,"statsdUdpAddress":"10.1.1.1:9125","statusPort":15020,"tracing":{"zipkin":{"address":"localhost:6000"}}},"STATIC_LABELS":{"app":"test","istio-locality":"regionA/z...

  },
  "layered_runtime": {
      "layers": [
          {
            "name": "global config",