@CheckForNull Strength keyStrength;
  @CheckForNull Strength valueStrength;

  @SuppressWarnings("GoodTime") // should be a java.time.Duration
  long expireAfterWriteNanos = UNSET_INT;

  @SuppressWarnings("GoodTime") // should be a java.time.Duration
  long expireAfterAccessNanos = UNSET_INT;

  @SuppressWarnings("GoodTime") // should be a java.time.Duration
  long refreshNanos = UNSET_INT;

   * @throws RejectedExecutionException if the task cannot be scheduled for execution
   * @since 23.0
   */
  @J2ktIncompatible
  @GwtIncompatible // java.util.concurrent.ScheduledExecutorService
  @SuppressWarnings("GoodTime") // should accept a java.time.Duration
  // TODO(cpovirk): Return ListenableScheduledFuture?
  public static <O extends @Nullable Object> ListenableFuture<O> scheduleAsync(
      AsyncCallable<O> callable,
      long delay,