return Iterators.size(entryIterator());
    }
  }

  @Override
  public RangeSet<C> subRangeSet(Range<C> view) {
    return view.equals(Range.all()) ? this : new SubRangeSet(view);
  }

  private final class SubRangeSet extends TreeRangeSet<C> {
    private final Range<C> restriction;

    SubRangeSet(Range<C> restriction) {
      super(
          new SubRangeSetRangesByLowerBound<C>(

  }

  @Override
  public void removeAll(RangeSet<C> other) {
    removeAll(other.asRanges());
  }

  @Override
  public boolean intersects(Range<C> otherRange) {
    return !subRangeSet(otherRange).isEmpty();
  }

  @Override
  public abstract boolean encloses(Range<C> otherRange);

  @Override
  public boolean equals(@Nullable Object obj) {
    if (obj == this) {
      return true;

  @Override
  public void removeAll(Iterable<Range<C>> ranges) {
    for (Range<C> range : ranges) {
      remove(range);
    }
  }

  @Override
  public boolean intersects(Range<C> otherRange) {
    return !subRangeSet(otherRange).isEmpty();
  }

  @Override
  public abstract boolean encloses(Range<C> otherRange);

  @Override
  public boolean equals(@Nullable Object obj) {
    if (obj == this) {

          testViewAgainstExpected(
              expectedSubRangeSet(rangeSet, subRange), rangeSet.subRangeSet(subRange));
        }
      }
    }
  }

  public void testSubRangeSetAdd() {
    TreeRangeSet<Integer> set = TreeRangeSet.create();
    Range<Integer> range = Range.closedOpen(0, 5);
    set.subRangeSet(range).add(range);
  }

  public void testSubRangeSetReplaceAdd() {

          return super.writeReplace();
        }
      };
    }
  }

  /** Returns a view of the intersection of this range set with the given range. */
  @Override
  public ImmutableRangeSet<C> subRangeSet(Range<C> range) {
    if (!isEmpty()) {
      Range<C> span = span();
      if (range.encloses(span)) {
        return this;
      } else if (range.isConnected(span)) {

          return super.writeReplace();
        }
      };
    }
  }

  /** Returns a view of the intersection of this range set with the given range. */
  @Override
  public ImmutableRangeSet<C> subRangeSet(Range<C> range) {
    if (!isEmpty()) {
      Range<C> span = span();
      if (range.encloses(span)) {
        return this;
      } else if (range.isConnected(span)) {