*
 *   private MyServer(...) {
 *     ...
 *     this.serverSocket = new ServerSocket(...);
 *     ...
 *   }
 *
 *   public static MyServer create(...) {
 *     MyServer myServer = new MyServer(...);
 *     final ServerSocket serverSocket = myServer.serverSocket;
 *     Reference<?> reference = new FinalizablePhantomReference<MyServer>(myServer, frq) {
 *       public void finalizeReferent() {