static void register(Object referent, CountDownLatch latch) {
      references.add(new FinalizableReference(referent, latch));
    }

    final CountDownLatch latch;

    FinalizableReference(Object referent, CountDownLatch latch) {
      super(referent, referenceQueue);
      this.latch = latch;
    }

    @Override
    public void finalizeReferent() {

    val secondRequest = "/bar"
    val firstRequest = "/foo"
    val latch = CountDownLatch(1)
    val dispatcher: Dispatcher =
      object : Dispatcher() {
        override fun dispatch(request: RecordedRequest): MockResponse {
          if (request.url.encodedPath == firstRequest) {
            latch.await()
          }
          return MockResponse()
        }
      }

        final CountDownLatch latch = new CountDownLatch(3);

        deferred.promise().error(error -> {
            callbackCount.incrementAndGet();
            latch.countDown();
        }).error(error -> {
            callbackCount.incrementAndGet();
            latch.countDown();
        }).error(error -> {
            callbackCount.incrementAndGet();
            latch.countDown();
        });

    CountDownLatch latch = new CountDownLatch(1);
    Object unused =
        new Object() {
          @SuppressWarnings({"removal", "Finalize"}) // b/487687332
          @Override
          protected void finalize() {
            latch.countDown();
          }
        };
    unused = null; // Hint to the JIT that unused is unreachable
    GcFinalization.await(latch);
    assertEquals(0, latch.getCount());
  }

            }
        };

        CountDownLatch latch = new CountDownLatch(1);

        Deferred<SuggestIndexResponse>.Promise promise = suggester.indexer().indexFromQueryLog(reader, 10, 0);
        promise.then(response -> latch.countDown()).error(error -> latch.countDown());

        assertTrue("Should complete within timeout", latch.await(ASYNC_TIMEOUT_SECONDS, TimeUnit.SECONDS));

  public void testAwaitWithNoWait() {
    Stopwatch stopwatch = Stopwatch.createStarted();
    CountDownLatch latch = new CountDownLatch(0);
    awaitUninterruptibly(latch);
    assertTrue(awaitUninterruptibly(latch, 0, MILLISECONDS));
    assertTrue(awaitUninterruptibly(latch, -42, MILLISECONDS));
    assertTrue(awaitUninterruptibly(latch, LONG_DELAY_MS, MILLISECONDS));
    assertTimeNotPassed(stopwatch, LONG_DELAY_MS);
  }

    static void register(Object referent, CountDownLatch latch) {
      references.add(new FinalizableReference(referent, latch));
    }

    final CountDownLatch latch;

    FinalizableReference(Object referent, CountDownLatch latch) {
      super(referent, referenceQueue);
      this.latch = latch;
    }

    @Override
    public void finalizeReferent() {

    // thread because the task will block on the task latch after unblocking
    // the run latch.
    exec.execute(task);
    runLatch.await();
    assertEquals(1, listenerLatch.getCount());
    assertFalse(task.isDone());
    assertFalse(task.isCancelled());

    // Finish the task by unblocking the task latch.  Then wait for the
    // listener to be called by blocking on the listener latch.
    taskLatch.countDown();

        ) {
          exceptionRef.set(e)
          latch.countDown()
        }

        @Throws(IOException::class)
        override fun onResponse(
          call: Call,
          response: Response,
        ) {
          response.close()
          latch.countDown()
        }
      },
    )
    latch.await()
    assertThat(call.isCanceled()).isTrue()

    CountDownLatch latch = new CountDownLatch(1);
    Object unused =
        new Object() {
          @SuppressWarnings({"removal", "Finalize"}) // b/487687332
          @Override
          protected void finalize() {
            latch.countDown();
          }
        };
    unused = null; // Hint to the JIT that unused is unreachable
    GcFinalization.await(latch);
    assertEquals(0, latch.getCount());
  }