checkContains(range);
    assertTrue(range.hasLowerBound());
    assertEquals(4, (int) range.lowerEndpoint());
    assertEquals(OPEN, range.lowerBoundType());
    assertTrue(range.hasUpperBound());
    assertEquals(8, (int) range.upperEndpoint());
    assertEquals(OPEN, range.upperBoundType());
    assertFalse(range.isEmpty());
    assertEquals("(4..8)", range.toString());
    reserializeAndAssert(range);
  }

    checkContains(range);
    assertTrue(range.hasLowerBound());
    assertEquals(4, (int) range.lowerEndpoint());
    assertEquals(OPEN, range.lowerBoundType());
    assertTrue(range.hasUpperBound());
    assertEquals(8, (int) range.upperEndpoint());
    assertEquals(OPEN, range.upperBoundType());
    assertFalse(range.isEmpty());
    assertEquals("(4..8)", range.toString());
    reserializeAndAssert(range);
  }

       * lower bounds.)
       */
      Cut<C> startingPoint =
          complementLowerBoundWindow.hasUpperBound()
              ? complementLowerBoundWindow.upperEndpoint()
              : Cut.aboveAll();
      boolean inclusive =
          complementLowerBoundWindow.hasUpperBound()
              && complementLowerBoundWindow.upperBoundType() == BoundType.CLOSED;
      PeekingIterator<Range<C>> positiveItr =

  private @Nullable AvlNode<E> lastNode() {
    AvlNode<E> root = rootReference.get();
    if (root == null) {
      return null;
    }
    AvlNode<E> node;
    if (range.hasUpperBound()) {
      // The cast is safe because of the hasUpperBound check.
      E endpoint = uncheckedCastNullableTToT(range.getUpperEndpoint());
      node = root.floor(comparator(), endpoint);
      if (node == null) {
        return null;
      }

    ComplementRanges(ImmutableList<Range<C>> ranges) {
      this.ranges = ranges;
      this.positiveBoundedBelow = ranges.get(0).hasLowerBound();
      this.positiveBoundedAbove = Iterables.getLast(ranges).hasUpperBound();

      int size = ranges.size() - 1;
      if (positiveBoundedBelow) {
        size++;
      }
      if (positiveBoundedAbove) {
        size++;
      }
      this.size = size;
    }