if (directoryPath == null)
            return;

        DirectoryCacheEntry entry = directoryCache.get(directoryPath);
        if (entry == null)
            return;

        // Handle lease break by updating cache behavior
        // Only process if newState is not NONE (0) - a valid lease state
        if (newState != 0) {

            }
        }

        /**
         * Checks if the crawling thread has finished execution.
         *
         * @return true if the thread has completed its crawling operation
         */
        public boolean isFinished() {
            return finished;
        }

        /**
         * Stops the crawling operation gracefully.
         * If a data store is currently active, this method calls

   * instead.
   *
   * @return {@code first} if it is non-null; otherwise {@code second} if it is non-null
   * @throws NullPointerException if both {@code first} and {@code second} are null
   * @since 18.0 (since 3.0 as {@code Objects.firstNonNull()}).
   */
  public static <T> T firstNonNull(@Nullable T first, @Nullable T second) {
    if (first != null) {
      return first;
    }
    if (second != null) {
      return second;
    }

	if r == nil {
		return nil
	}

	if r.APIVersion != batchKeyRotateAPIVersion {
		return errInvalidArgument
	}

	if r.Bucket == "" {
		return errInvalidArgument
	}

	if _, err := o.GetBucketInfo(ctx, r.Bucket, BucketOptions{}); err != nil {
		if isErrBucketNotFound(err) {
			return batchKeyRotationJobError{

    // Don't refer to ImmutableSortedSet by name so it won't pull in all that code
    if (elements instanceof ImmutableSet && !(elements instanceof SortedSet)) {
      @SuppressWarnings("unchecked") // all supported methods are covariant
      ImmutableSet<E> set = (ImmutableSet<E>) elements;
      if (!set.isPartialView()) {
        return set;
      }
    } else if (elements instanceof EnumSet) {
      return copyOfEnumSet((EnumSet<?>) elements);

        if (StringUtil.isNotBlank(path)) {
            final String lowerPath = path.toLowerCase(Locale.ROOT);
            if (lowerPath.endsWith(".html")) {
                response.setContentType("text/html;charset=utf-8");
            } else if (lowerPath.endsWith(".css")) {
                response.setContentType("text/css");
            } else if (lowerPath.endsWith(".eot")) {

  for (file in files) {
    try {
      if (metadata(file).isDirectory) {
        deleteContents(file)
      }

      delete(file)
    } catch (ioe: IOException) {
      if (exception == null) {
        exception = ioe
      }
    }
  }
  if (exception != null) {
    throw exception
  }
}

internal fun <E> MutableList<E>.addIfAbsent(element: E) {
  if (!contains(element)) add(element)
}

}

const probeObject = "probeobject"

// checkWarmBackend checks if tier config credentials have sufficient privileges
// to perform all operations defined in the WarmBackend interface.
func checkWarmBackend(ctx context.Context, w WarmBackend) error {
	remoteVersionID, err := w.Put(ctx, probeObject, strings.NewReader("MinIO"), 5)
	if err != nil {
		if _, ok := err.(BackendDown); ok {
			return err
		}
		return tierPermErr{

    }

    /**
     * Checks if a previous page exists for pagination.
     *
     * @return true if a previous page exists, false otherwise
     */
    public boolean isExistPrePage() {
        return existPrePage;
    }

    /**
     * Sets the flag indicating whether a previous page exists.
     *
     * @param existPrePage true if a previous page exists, false otherwise
     */

    return BigInteger.valueOf(longValue());
  }

  /**
   * Compares this unsigned integer to another unsigned integer. Returns {@code 0} if they are
   * equal, a negative number if {@code this < other}, and a positive number if {@code this >
   * other}.
   */
  @Override
  public int compareTo(UnsignedInteger other) {
    checkNotNull(other);
    return compare(value, other.value);
  }