How to use the tls.TLSSocket function in tls

const getSocket = function(protocol, options) {
  switch (protocol) {
  case 'tcp':
    return new net.Socket();
  case 'tls':
    // todo
  case 'ssl':
    return new tls.TLSSocket(options);
  }

  throw new Error('unknown protocol');
}

this.dataSocket.connect({host, port, family}, () => {
        this.dataSocket.pause();

        if (this.connection.secure) {
          const secureContext = tls.createSecureContext(this.server.options.tls);
          const secureSocket = new tls.TLSSocket(this.dataSocket, {
            isServer: true,
            secureContext
          });
          this.dataSocket = secureSocket;
        }
        this.dataSocket.connected = true;
      });
    });

function secureTLSSocket(conn, client) {
    const serverSocket = new tls.TLSSocket(conn, options);
    serverSocket.on('error', (e) => {
      throw new Error(`Socket error: ${e}`);
    });
    serverSocket.pipe(client);
  }