s.Env = cg.Env()
	s.Env.GatewayAPIController = gwc
	if err := s.Env.InitNetworksManager(s); err != nil {
		t.Fatal(err)
	}

	bootstrap.InitGenerators(s, core.NewConfigGenerator(s.Cache), "istio-system", "", nil)
	s.Generators[v3.SecretType] = xds.NewSecretGen(creds, s.Cache, opts.DefaultClusterName, nil)
	s.Generators[v3.ExtensionConfigurationType].(*xds.EcdsGenerator).SetCredController(creds)

		fn(s)
	}
	// Initialize workload Trust Bundle before XDS Server
	e.TrustBundle = s.workloadTrustBundle
	s.XDSServer = xds.NewDiscoveryServer(e, args.RegistryOptions.KubeOptions.ClusterAliases)
	configGen := core.NewConfigGenerator(s.XDSServer.Cache)

	grpcprom.EnableHandlingTimeHistogram()

	// make sure we have a readiness probe before serving HTTP to avoid marking ready too soon
	s.initReadinessProbes()

	s.initServers(args)