for (Range<Integer> range : rangeSet.asRanges()) {
              if (range.isConnected(subRange)) {
                expected.add(range.intersection(subRange));
              }
            }
            ImmutableRangeSet<Integer> subRangeSet = rangeSet.subRangeSet(subRange);
            assertEquals(expected, subRangeSet);
            assertEquals(expected.asRanges(), subRangeSet.asRanges());
            if (!expected.isEmpty()) {

    this.rangesByLowerBound = rangesByLowerCut;
  }

  @LazyInit private transient @Nullable Set<Range<C>> asRanges;
  @LazyInit private transient @Nullable Set<Range<C>> asDescendingSetOfRanges;

  @Override
  public Set<Range<C>> asRanges() {
    Set<Range<C>> result = asRanges;
    return (result == null) ? asRanges = new AsRanges(rangesByLowerBound.values()) : result;
  }

  @Override
  public Set<Range<C>> asDescendingSetOfRanges() {

   * returns an {@code ImmutableRangeSet}.
   *
   * @since 21.0
   */
  public ImmutableRangeSet<C> union(RangeSet<C> other) {
    return unionOf(Iterables.concat(asRanges(), other.asRanges()));
  }

  /**
   * Returns a new range set consisting of the intersection of this range set and {@code other}.
   *
   * <p>This is essentially the same as {@code