"typed_config": {
            "@type": "type.googleapis.com/udpa.type.v1.TypedStruct",
            "type_url": "type.googleapis.com/io.istio.network.authn.Config"
           }
          },
          {
           "name": "istio.metadata_exchange",
           "typed_config": {
            "@type": "type.googleapis.com/envoy.tcp.metadataexchange.config.MetadataExchange",