*/
  private static final Comparator<?> NATURAL_ORDER = Ordering.natural();

  private static final ImmutableSortedMap<Comparable<?>, Object> NATURAL_EMPTY_MAP =
      new ImmutableSortedMap<>(ImmutableSortedSet.emptySet(Ordering.natural()), ImmutableList.of());

  static <K, V> ImmutableSortedMap<K, V> emptyMap(Comparator<? super K> comparator) {
    if (Ordering.natural().equals(comparator)) {
      return of();
    } else {

   */
  private static final Comparator<?> NATURAL_ORDER = Ordering.natural();

  private static final ImmutableSortedMap<Comparable<?>, Object> NATURAL_EMPTY_MAP =
      new ImmutableSortedMap<>(ImmutableSortedSet.emptySet(Ordering.natural()), ImmutableList.of());

  static <K, V> ImmutableSortedMap<K, V> emptyMap(Comparator<? super K> comparator) {
    if (Ordering.natural().equals(comparator)) {
      return of();
    } else {

      if (forwardComparator == null) {
        return (Comparator) Ordering.natural().reverse();
      } else {
        return reverse(forwardComparator);
      }
    }

    // If we inline this, we get a javac error.
    private static <T extends @Nullable Object> Ordering<T> reverse(Comparator<T> forward) {
      return Ordering.from(forward).reverse();
    }

    @Override

      if (forwardComparator == null) {
        return (Comparator) Ordering.natural().reverse();
      } else {
        return reverse(forwardComparator);
      }
    }

    // If we inline this, we get a javac error.
    private static <T extends @Nullable Object> Ordering<T> reverse(Comparator<T> forward) {
      return Ordering.from(forward).reverse();
    }

    @Override

      return aboveMe + 1;
    }

    private static <K, V> ImmutableList<K> sortKeysByValue(
        Map<K, V> map, Comparator<? super V> valueComparator) {
      Ordering<K> keyOrdering =
          new Ordering<K>() {
            @Override
            public int compare(K left, K right) {
              // requireNonNull is safe because we are passing keys in the map.

     *
     * @param <E> the element type of {@link PriorityBlockingQueue}
     * @param initialCapacity the initial capacity of the priority queue
     * @param comparator the comparator for ordering the elements in the priority queue
     * @return a new instance of {@link PriorityBlockingQueue}
     * @see PriorityBlockingQueue#PriorityBlockingQueue(int, Comparator)
     */

   * across different segments.
   *
   * The page replacement algorithm's data structures are kept casually consistent with the map. The
   * ordering of writes to a segment is sequentially consistent. An update to the map and recording
   * of reads may not be immediately reflected on the algorithm's data structures. These structures

   * across different segments.
   *
   * The page replacement algorithm's data structures are kept casually consistent with the map. The
   * ordering of writes to a segment is sequentially consistent. An update to the map and recording
   * of reads may not be immediately reflected on the algorithm's data structures. These structures

		if err != nil {
			return s, err
		}
		diskID := format.Erasure.This
		if m != ep.SetIdx || n != ep.DiskIdx {
			storageLogOnceIf(context.Background(),
				fmt.Errorf("unexpected drive ordering on pool: %s: found drive at (set=%s, drive=%s), expected at (set=%s, drive=%s): %s(%s): %w",
					humanize.Ordinal(ep.PoolIdx+1), humanize.Ordinal(m+1), humanize.Ordinal(n+1), humanize.Ordinal(ep.SetIdx+1), humanize.Ordinal(ep.DiskIdx+1),

			}
			if !tc.hasRules && len(rules) > 0 {
				t.Fatalf("%d: Expected no rules to match but got matches %v", i+1, rules)
			}
		})
	}
}

// TestDeleteAllVersions tests ordering among events, especially ones which
// expire all versions like ExpiredObjectDeleteAllVersions and
// DelMarkerExpiration
func TestDeleteAllVersions(t *testing.T) {
	// ExpiredObjectDeleteAllVersions