void IListener.Call(params object[] args)
        {
            var err = args[0];
            PureEngineIOException error;

            if (err is Exception exception)
            {
                error = new PureEngineIOException("probe error", exception);
            }
            else if (err is string s)
            {
                error = new PureEngineIOException("probe error: " + s);
            }
            else
            {
                error = new PureEngineIOException("probe error");
            }
            error.Transport = Transport[0].Name;

            FreezeTransport.Call();

            Logger.Log(new Exception($"probe transport \"{error.Transport}\" failed because of error: {err}"));
            _socket.Emit(PureEngineIoSocket.EVENT_UPGRADE_ERROR, error);
        }
        public void OnPacket(Packet packet)
        {
            if (ReadyState == ReadyStateEnum.OPENING || ReadyState == ReadyStateEnum.OPEN)
            {
                Logger.Log($"socket received: type '{packet.Type}', data '{packet.Data}'");

                Emit(EVENT_PACKET, packet);
                Emit(EVENT_HEARTBEAT);

                if (packet.Type == Packet.OPEN)
                {
                    OnHandshake(HandshakeData.FromString((string)packet.Data));
                }
                else if (packet.Type == Packet.PONG)
                {
                    SetPing();
                }
                else if (packet.Type == Packet.ERROR)
                {
                    var err = new PureEngineIOException("server error")
                    {
                        Code = packet.Data
                    };
                    Emit(EVENT_ERROR, err);
                }
                else if (packet.Type == Packet.MESSAGE)
                {
                    Emit(EVENT_DATA, packet.Data);
                    Emit(EVENT_MESSAGE, packet.Data);
                }
            }
            else
            {
                Logger.Log($"OnPacket packet received with socket readyState '{ReadyState}'");
            }
        }