Handle dart.io:WebSocket response status

[jimmyshiau]

Is it possible to add response.statusCode in WebSocketException?
for example when server response other statusCode, we can handle it in catchError

if (response.statusCode != HttpStatus.SWITCHING_PROTOCOLS ||
          response.headers[HttpHeaders.CONNECTION] == null ||
          !response.headers[HttpHeaders.CONNECTION]
              .any((value) => value.toLowerCase() == "upgrade") ||
          response.headers.value(HttpHeaders.UPGRADE).toLowerCase() !=
              "websocket") {
        error("Connection to '$uri' was not upgraded to websocket");
      }
``