delay := env.Get(EnvDelayLegacy, "")
	if delay == "" {
		delay = env.Get(EnvDelay, kvs.GetWithDefault(Delay, DefaultKVS))
	}
	cfg.Delay, err = strconv.ParseFloat(delay, 64)
	if err != nil {
		return err
	}
	maxWait := env.Get(EnvMaxWaitLegacy, "")
	if maxWait == "" {
		maxWait = env.Get(EnvMaxWait, kvs.GetWithDefault(MaxWait, DefaultKVS))
	}
	cfg.MaxWait, err = time.ParseDuration(maxWait)
	if err != nil {
		return err

  }

  @Override
  public final ScheduledFuture<?> schedule(Runnable command, long delay, TimeUnit unit) {
    return delegate.schedule(wrapTask(command), delay, unit);
  }

  @Override
  public final <V extends @Nullable Object> ScheduledFuture<V> schedule(
      Callable<V> task, long delay, TimeUnit unit) {
    return delegate.schedule(wrapTask(task), delay, unit);
  }

  @Override
  public final ScheduledFuture<?> scheduleAtFixedRate(

    }

    /**
     * Set the delayed time of the response body to [delay]. This applies to the response body
     * only; response headers are not affected.
     */
    fun bodyDelay(
      delay: Long,
      unit: TimeUnit,
    ) = apply {
      bodyDelayNanos = unit.toNanos(delay)
    }

    fun headersDelay(
      delay: Long,
      unit: TimeUnit,
    ) = apply {

Isso significa que no lugar do processo normal de seus usuários enviarem requisições para a sua API, é a **sua API** (ou sua aplicação) que poderia **enviar requisições para o sistema deles** (para a API deles, a aplicação deles).

Isso normalmente é chamado de **webhook**.

    long lastDelay;
    TimeUnit lastUnit;

    void assertLastMethodCalled(String method, long delay, TimeUnit unit) {
      assertEquals(method, lastMethodCalled);
      assertEquals(delay, lastDelay);
      assertEquals(unit, lastUnit);
    }

    void assertLastMethodCalled(String method, long initialDelay, long delay, TimeUnit unit) {
      assertEquals(method, lastMethodCalled);

        this.delay = delay;
        this.unit = checkNotNull(unit);
      }

      /**
       * @param delay the time from now to delay execution
       * @since 31.1 (but only since 33.4.0 in the Android flavor)
       */
      public Schedule(Duration delay) {
        this(toNanosSaturated(delay), NANOSECONDS);
      }
    }

    /**

  }

  @Test fun test() {
    val t1 = System.nanoTime() / 1e6

    val delays = mutableListOf(TimeUnit.MILLISECONDS.toNanos(1000), -1L)
    queue.schedule("task", TimeUnit.MILLISECONDS.toNanos(750)) {
      log.put("runOnce delays.size=${delays.size}")
      return@schedule delays.removeAt(0)
    }

    assertThat(log.take()).isEqualTo("runOnce delays.size=2")
    val t2 = System.nanoTime() / 1e6 - t1

    Preconditions.checkNotNull(command, "command must not be null");
    Preconditions.checkNotNull(unit, "unit must not be null!");
    return schedule(Executors.callable(command), delay, unit);
  }

  @Override
  public <V> ListenableScheduledFuture<V> schedule(
      Callable<V> callable, long delay, TimeUnit unit) {

    Preconditions.checkNotNull(command, "command must not be null");
    Preconditions.checkNotNull(unit, "unit must not be null!");
    return schedule(Executors.callable(command), delay, unit);
  }

  @Override
  public <V> ListenableScheduledFuture<V> schedule(
      Callable<V> callable, long delay, TimeUnit unit) {

  fun setBodyDelay(
    delay: Long,
    unit: TimeUnit,
  ) = apply {
    bodyDelayAmount = delay
    bodyDelayUnit = unit
  }

  fun getBodyDelay(unit: TimeUnit): Long = unit.convert(bodyDelayAmount, bodyDelayUnit)

  fun setHeadersDelay(
    delay: Long,
    unit: TimeUnit,
  ) = apply {
    headersDelayAmount = delay
    headersDelayUnit = unit
  }