*/
    private final Range<Cut<C>> upperBoundWindow;

    RangesByUpperBound(NavigableMap<Cut<C>, Range<C>> rangesByLowerBound) {
      this.rangesByLowerBound = rangesByLowerBound;
      this.upperBoundWindow = Range.all();
    }

    private RangesByUpperBound(
        NavigableMap<Cut<C>, Range<C>> rangesByLowerBound, Range<Cut<C>> upperBoundWindow) {

          expectedRangesByUpperBound.put(range.upperBound, range);
        }
        testNavigationAgainstExpected(
            expectedRangesByUpperBound,
            new TreeRangeSet.RangesByUpperBound<Integer>(rangeSet.rangesByLowerBound),
            CUTS_TO_TEST);
      }
    }
  }

  public void testMergesConnectedWithOverlap() {
    TreeRangeSet<Integer> rangeSet = TreeRangeSet.create();