anchor.diff:        this.sequence = json['s'];
       }
   
  +    if (json['op'] == 11) print(11);
  +
       switch (json['op']) {
         case _OPCodes.hello:
  -        const Duration heartbeatInterval = const Duration(milliseconds: 41250);
  -        new Timer.periodic(heartbeatInterval, (Timer t) => this.heartbeat());
  -
           if (this.sessionId == null || !resume) {
             this.send("IDENTIFY", <String, dynamic>{
               "token": this.ws.client._token,
  
positive.code:   /// Sends a heartbeat packet.
    void heartbeat() {
      this.send("HEARTBEAT", this.sequence);
    }
  
    Future<Null> handleMsg(String msg, bool resume) async {
  
negative.code: 
  class _Shard {
    int id;
    int heartbeatInterval;
    _WS ws;
    WebSocket socket;
    int sequence;
  