bootstrap: "{\"xds_servers\": [{\"server_uri\":\"xds.example.com:-257\", \"channel_creds\":[{\"type\": \"fake\"}]}]}"
actions {
  start_watch {
    resource_type {
      route_config {
      }
    }
  }
}
actions {
  send_message_to_client {
    stream_id {
      ads {
      }
    }
    response {
      version_info: "grpc.lookup.v1.RouteLookup"
      resources {
        type_url: "envoy.config.route.v3.RouteConfiguration"
        value: "\010\001b\000"
      }
      type_url: "envoy.config.route.v3.RouteConfiguration"
      nonce: "/@\001\000\\\000\000x141183468234106731687303715884105729"
    }
  }
}
