* @return the last element, or null if the collection is empty
     * @since Java 21
     */
    public static <E> E getLast(final SequencedCollection<E> collection) {
        return collection.isEmpty() ? null : collection.getLast();
    }

    /**
     * Adds an element to the beginning of a sequenced collection.
     *
     * @param <E> the element type

    
    return transports.computeIfAbsent(key, k -> {
        try {
            SmbTransport transport = new SmbTransport(
                context,
                remoteIf.getAddress(),
                remoteIf.getPort(),
                localIf.getAddress()
            );
            
            transport.connect();
            return transport;
            
        } catch (IOException e) {

                    }
                    try {
                        final URL u = getURL();
                        final String protocol = u.getProtocol();
                        int port = u.getPort();
                        if (port == -1) {
                            port = "https".equalsIgnoreCase(protocol) ? 443 : 80;
                        }
                        final PasswordAuthentication auth =

    CompletableFuture.runAsync(() -> {
        try {
            // Create new transport to new address
            SmbTransport newTransport = new SmbTransport(context, newAddress, transport.getPort());
            
            // Disconnect old transport
            transport.disconnect();
            
            // Replace with new transport
            this.transport = newTransport;

      this.flags = flags;
    }

    public Inet4Address getServer() {
      return server;
    }

    public Inet4Address getClient() {
      return client;
    }

    public int getPort() {
      return port;
    }

    public int getFlags() {
      return flags;
    }
  }

  /**
   * Evaluates whether the argument is a Teredo address.
   *

                    }

                    final UniAddress addr = UniAddress.getByName(dr.server);
                    final SmbTransport trans = SmbTransport.getSmbTransport(addr, url.getPort());
                    /* This is a key point. This is where we set the "tree" of this file which
                     * is like changing the rug out from underneath our feet.
                     */

                if (authScope.getHost() != null && authScheme != null) {
                    final HttpHost targetHost = new HttpHost(authScope.getHost(), authScope.getPort());
                    authCache.put(targetHost, authScheme);
                }
            }
        }

        httpClientContext.setAuthCache(authCache);

      this.flags = flags;
    }

    public Inet4Address getServer() {
      return server;
    }

    public Inet4Address getClient() {
      return client;
    }

    public int getPort() {
      return port;
    }

    public int getFlags() {
      return flags;
    }
  }

  /**
   * Evaluates whether the argument is a Teredo address.
   *

- Fixed a bug in client-go where new clients with customized `Dial`, `Proxy`, `GetCert` config may get stale HTTP transports. ([#95427](https://github.com/kubernetes/kubernetes/pull/95427), [@roycaihw](https://github.com/roycaihw)) [SIG API Machinery]

- Fixed a bug in client-go where new clients with customized `Dial`, `Proxy`, `GetCert` config may get stale HTTP transports. ([#95427](https://github.com/kubernetes/kubernetes/pull/95427), [@roycaihw](https://github.com/roycaihw)) [SIG API Machinery]