code: public static WebsocketServerTransport create(String bindAddress, int port) {
      Objects.requireNonNull(bindAddress, "bindAddress must not be null");
  
      HttpServer httpServer = HttpServer.create().host(bindAddress).port(port);
      return create(httpServer);
    }
docs: Creates a new instance
  
  @param bindAddress the address to bind to
  @param port the port to bind to
  @return a new instance
  @throws NullPointerException if {@code bindAddress} is {@code null}