}

    NavigableMap<Cut<Integer>, Range<Integer>> rangesByLowerBound = rangeSet.rangesByLowerBound;
    testNavigationAgainstExpected(expectedRangesByLowerBound, rangesByLowerBound, CUTS_TO_TEST);
  }

  <K, V> void testNavigationAgainstExpected(
      NavigableMap<K, V> expected, NavigableMap<K, V> navigableMap, Iterable<K> keysToTest) {
    for (K key : keysToTest) {