static final AtomicInteger THREAD_NUMBER = new AtomicInteger(1);

        public Thread newThread(Runnable r) {
            Thread newThread = new Thread(GROUP, r, "resolver-" + THREAD_NUMBER.getAndIncrement());
            newThread.setDaemon(true);
            newThread.setContextClassLoader(null);
            return newThread;
        }
    }

    private class ResolveTask implements Runnable {

   */
  @J2ktIncompatible
  @GwtIncompatible // concurrency
  static Thread newThread(String name, Runnable runnable) {
    checkNotNull(name);
    checkNotNull(runnable);
    // TODO(b/139726489): Confirm that null is impossible here.
    Thread result = requireNonNull(platformThreadFactory().newThread(runnable));
    try {
      result.setName(name);
    } catch (SecurityException e) {

   * fails}.
   */
  protected ScheduledExecutorService executor() {
    @WeakOuter
    class ThreadFactoryImpl implements ThreadFactory {
      @Override
      public Thread newThread(Runnable runnable) {
        return MoreExecutors.newThread(serviceName(), runnable);
      }
    }
    final ScheduledExecutorService executor =
        Executors.newSingleThreadScheduledExecutor(new ThreadFactoryImpl());

        new ThreadPoolExecutor(1, 2, 3, TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(1));
    assertNotNull(application.getExitingExecutorService(executor));
    assertTrue(executor.getThreadFactory().newThread(EMPTY_RUNNABLE).isDaemon());
  }

  @AndroidIncompatible // Mocking ExecutorService is forbidden there. TODO(b/218700094): Don't mock.
  public void testGetExitingExecutorService_executorDelegatesToOriginal() {

        new ThreadPoolExecutor(1, 2, 3, TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(1));
    assertNotNull(application.getExitingExecutorService(executor));
    assertTrue(executor.getThreadFactory().newThread(EMPTY_RUNNABLE).isDaemon());
  }

  @AndroidIncompatible // Mocking ExecutorService is forbidden there. TODO(b/218700094): Don't mock.
  public void testGetExitingExecutorService_executorDelegatesToOriginal() {

      @Override
      public void run() {}
    }

    public static final class DummyThreadFactory implements ThreadFactory, Serializable {
      @Override
      public Thread newThread(Runnable r) {
        return new Thread(r);
      }
    }

    public static final class DummyExecutor implements Executor, Serializable {
      @Override
      public void execute(Runnable command) {}

      @Override
      public void run() {}
    }

    public static final class DummyThreadFactory implements ThreadFactory, Serializable {
      @Override
      public Thread newThread(Runnable r) {
        return new Thread(r);
      }
    }

    public static final class DummyExecutor implements Executor, Serializable {
      @Override
      public void execute(Runnable command) {}

      }
    }
  }

  /** For use as ThreadFactory in constructors */
  public static class SimpleThreadFactory implements ThreadFactory {
    @Override
    public Thread newThread(Runnable r) {
      return new Thread(r);
    }
  }

  public interface TrackedRunnable extends Runnable {
    boolean isDone();
  }

      } catch (InterruptedException ok) {
      }
    }
  }

  /** For use as ThreadFactory in constructors */
  public static class SimpleThreadFactory implements ThreadFactory {
    public Thread newThread(Runnable r) {
      return new Thread(r);
    }
  }

  public interface TrackedRunnable extends Runnable {
    boolean isDone();
  }

      RunnableExecutorPair newHead = new RunnableExecutorPair(runnable, executor);
      RunnableExecutorPair oldHead;
      do {
        oldHead = head;
        if (oldHead == null) {
          // If runnables == null then execute() has been called so we should just execute our
          // listener immediately.
          newHead.execute();
          return;
        }