}

    private NavigableMap<Cut<C>, Range<C>> subMap(Range<Cut<C>> window) {
      if (window.isConnected(upperBoundWindow)) {
        return new RangesByUpperBound<>(rangesByLowerBound, window.intersection(upperBoundWindow));
      } else {
        return ImmutableSortedMap.of();
      }
    }

    @Override
    public NavigableMap<Cut<C>, Range<C>> subMap(

    /**
     * Usually the same as map, but smaller for the headMap(), tailMap(), or subMap() of a
     * SortedAsMap.
     */
    final transient Map<K, Collection<V>> submap;

    AsMap(Map<K, Collection<V>> submap) {
      this.submap = submap;
    }

    @Override
    protected Set<Entry<K, Collection<V>>> createEntrySet() {
      return new AsMapEntries();

		minPartSz = int64(5) * humanize.MiByte
		maxPartSz = int64(5) * humanize.GiByte

		getEncSize = func(s int64) int64 {
			v, _ := sio.EncryptedSize(uint64(s))
			return int64(v)
		}
		udMap = func(isMulti bool) map[string]string {
			m := map[string]string{
				crypto.MetaAlgorithm: crypto.InsecureSealAlgorithm,
				crypto.MetaMultipart: "1",
			}
			if !isMulti {
				delete(m, crypto.MetaMultipart)

                allEntries.addAll(normalValues);
                SortedMultiset<E> multiset =
                    (SortedMultiset<E>) delegate.create(allEntries.toArray());

                // call the smallest subMap overload that filters out the extreme
                // values
                if (from == Bound.INCLUSIVE) {
                  multiset = multiset.tailMultiset(firstInclusive, BoundType.CLOSED);

   * Compares strings in natural order except that null comes immediately before a given value. This
   * works better than Ordering.natural().nullsFirst() because, if null comes before all other
   * values, it lies outside the submap/submultiset ranges we test, and the variety of tests that
   * exercise null handling fail on those subcollections.
   */
  public abstract static class NullsBefore implements Comparator<@Nullable String>, Serializable {