&& Objects.equals(
            durationInNanos(writeExpirationDuration, writeExpirationTimeUnit),
            durationInNanos(that.writeExpirationDuration, that.writeExpirationTimeUnit))
        && Objects.equals(
            durationInNanos(accessExpirationDuration, accessExpirationTimeUnit),
            durationInNanos(that.accessExpirationDuration, that.accessExpirationTimeUnit))

        && Objects.equals(
            durationInNanos(writeExpirationDuration, writeExpirationTimeUnit),
            durationInNanos(that.writeExpirationDuration, that.writeExpirationTimeUnit))
        && Objects.equals(
            durationInNanos(accessExpirationDuration, accessExpirationTimeUnit),
            durationInNanos(that.accessExpirationDuration, that.accessExpirationTimeUnit))

    final Supplier<T> delegate;
    final long durationNanos;
    transient volatile @Nullable T value;
    // The special value 0 means "not yet initialized".
    transient volatile long expirationNanos;

    ExpiringMemoizingSupplier(Supplier<T> delegate, long durationNanos) {
      this.delegate = delegate;
      this.durationNanos = durationNanos;
    }

    @Override
    @ParametricNullness

        contextSwitchCount > contextSwitchCountBefore
      }
    }
  }

  /** Sleep until [durationNanos] elapses. For use by the task threads. */
  fun sleep(durationNanos: Long) {
    taskRunner.withLock {
      val sleepUntil = nanoTime + durationNanos
      yieldUntil { nanoTime >= sleepUntil }
    }
  }

  /**

    final Supplier<T> delegate;
    final long durationNanos;
    transient volatile @Nullable T value;
    // The special value 0 means "not yet initialized".
    transient volatile long expirationNanos;

    ExpiringMemoizingSupplier(Supplier<T> delegate, long durationNanos) {
      this.delegate = delegate;
      this.durationNanos = durationNanos;
    }

    @Override
    @ParametricNullness