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);