How to use the node-opcua-transport.ServerTCP_transport function in node-opcua-transport

ServerSecureChannelLayer.prototype.init = function(socket, callback) {
    const self = this;

    self.transport = new ServerTCP_transport();
    self.transport.timeout = self.timeout;

    self.transport.init(socket, function(err) {
        if (err) {
            callback(err);
        } else {
            // bind low level TCP transport to messageBuilder
            self.transport.on("message", function(message_chunk) {
                assert(self.messageBuilder);
                self.messageBuilder.feed(message_chunk);
            });
            debugLog("ServerSecureChannelLayer : Transport layer has been initialized");
            debugLog("... now waiting for OpenSecureChannelRequest...");

            ServerSecureChannelLayer.registry.register(self);

super();

        this._on_response = null;
        this.__verifId = {};
        this._abort_has_been_called = false;
        this.endpoint = null;
        this._remoteAddress = "";
        this._remotePort = 0;
        this.receiverCertificate = null;
        this.receiverPublicKey = null;
        this.receiverPublicKeyLength = 0;
        this.clientCertificate = null;
        this.clientNonce = null;

        this.transport = new ServerTCP_transport();

        this.__hash = getNextChannelId();
        assert(this.__hash > 0);

        this.channelId = null;

        this.revisedLifetime = 0;

        this.parent = options.parent;

        this.protocolVersion = 0;

        this.lastTokenId = 0;

        this.timeout = options.timeout || 30000; // connection timeout
        debugLog("server secure channel layer tiemput = ", this.timeout);