* {@code Range} entries.
   *
   * <p>It is guaranteed that no empty ranges will be in the returned {@code Map}.
   *
   * @since 19.0
   */
  Map<Range<K>, V> asDescendingMapOfRanges();

  /**
   * Returns a view of the part of this range map that intersects with {@code range}.
   *
   * <p>For example, if {@code rangeMap} had the entries {@code [1, 5] => "foo", (6, 8) => "bar",

              ImmutableMap.of(range1, 1, range2, 2);
          ImmutableMap<Range<Integer>, Integer> asMap = rangeMap.asMapOfRanges();
          ImmutableMap<Range<Integer>, Integer> descendingMap = rangeMap.asDescendingMapOfRanges();
          assertEquals(expectedAsMap, asMap);
          assertEquals(expectedAsMap, descendingMap);
          SerializableTester.reserializeAndAssert(asMap);

              ImmutableMap.of(range1, 1, range2, 2);
          ImmutableMap<Range<Integer>, Integer> asMap = rangeMap.asMapOfRanges();
          ImmutableMap<Range<Integer>, Integer> descendingMap = rangeMap.asDescendingMapOfRanges();
          assertEquals(expectedAsMap, asMap);
          assertEquals(expectedAsMap, descendingMap);
          SerializableTester.reserializeAndAssert(asMap);