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

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

    static MyServerExampleWithFrq create(AtomicBoolean finalizeReferentRan) throws IOException {
      MyServerExampleWithFrq myServer = new MyServerExampleWithFrq();
      ServerSocket serverSocket = myServer.serverSocket;
      Reference<?> reference =
          new FinalizablePhantomReference<MyServerExampleWithFrq>(myServer, frq) {
            @Override
            public void finalizeReferent() {
              references.remove(this);