class ProtocolsWss not exist

$con = new AsyncTcpConnection('wss://openspeech.bytedance.com:443/api/v2/asr');
        $con->transport = 'ssl';

        $con->onConnect = function(AsyncTcpConnection $con) {
            $con->send('hello');
        };

        $con->onMessage = function(AsyncTcpConnection $con, $data) {
            echo $data;
        };

        $con->connect();