* {@link IllegalArgumentException} if passed a {@code toKey} greater than an earlier {@code
   * toKey}. However, this method doesn't throw an exception in that situation, but instead keeps
   * the original {@code toKey}.
   */
  @Override
  public ImmutableSortedMap<K, V> headMap(K toKey) {
    return headMap(toKey, false);
  }

  /**

   * {@link IllegalArgumentException} if passed a {@code toKey} greater than an earlier {@code
   * toKey}. However, this method doesn't throw an exception in that situation, but instead keeps
   * the original {@code toKey}.
   */
  @Override
  public ImmutableSortedMap<K, V> headMap(K toKey) {
    return headMap(toKey, false);
  }

  /**

			metaArr[index].VersionID = versionID
			if !metaArr[index].InlineData() {
				// If the data is not inlined, we may end up incorrectly
				// inlining the data here, that leads to an inconsistent
				// situation where some objects are were not inlined
				// were now inlined, make sure to `nil` the Data such
				// that xl.meta is written as expected.
				metaArr[index].Data = nil
			}

			// branch
			xlMeta.data.remove(versionID, dataDir)

			// We need to attempt delete "dataDir" on the disk
			// due to a CopyObject() bug where it might have
			// inlined the data incorrectly, to avoid a situation
			// where we potentially leave "DataDir"
			filePath := pathJoin(volumeDir, path, dataDir)
			if err = checkPathLength(filePath); err != nil {
				return err
			}

 * java.util.Objects#requireNonNull(Object)}. Instead, use whichever of {@link
 * #checkNotNull(Object)} or {@link Verify#verifyNotNull(Object)} is appropriate to the situation.
 * (The same goes for the message-accepting overloads.)
 *
 * <h3>Only {@code %s} is supported</h3>
 *
 * <p>{@code Preconditions} uses {@link Strings#lenientFormat} to format error message template

		if info.Name == "success-vol" {
			volFound = true
			break
		}
	}
	if !volFound {
		t.Errorf("expected: success-vol to be created")
	}

	// removing the path and simulating disk failure
	os.RemoveAll(path)
	// should fail with errDiskNotFound.
	if _, err = xlStorage.ListVols(t.Context()); err != errDiskNotFound {

 * java.util.Objects#requireNonNull(Object)}. Instead, use whichever of {@link
 * #checkNotNull(Object)} or {@link Verify#verifyNotNull(Object)} is appropriate to the situation.
 * (The same goes for the message-accepting overloads.)
 *
 * <h3>Only {@code %s} is supported</h3>
 *
 * <p>{@code Preconditions} uses {@link Strings#lenientFormat} to format error message template

// returns to the caller which dataDir to delete, also
// indicates if this is the last version.
func (x *xlMetaV2) DeleteVersion(fi FileInfo) (string, error) {
	// This is a situation where versionId is explicitly
	// specified as "null", as we do not save "null"
	// string it is considered empty. But empty also
	// means the version which matches will be purged.
	if fi.VersionID == nullVersionID {