* interface.
   *
   * @since 14.0 (present with return type {@code SortedMap} since 2.0)
   */
  @Override
  public NavigableMap<K, Collection<V>> asMap() {
    return (NavigableMap<K, Collection<V>>) super.asMap();
  }

  /**
   * @serialData key comparator, value comparator, number of distinct keys, and then for each
   *     distinct key: the key, number of values for that key, and key values

    Map<String, Integer> map = Maps.asMap(strings, LENGTH_FUNCTION);
    assertEquals(ImmutableMap.of("one", 3, "two", 3, "three", 5), map);
    assertEquals(Integer.valueOf(3), map.remove("two"));
    assertThat(strings).containsExactly("one", "three").inOrder();
  }

  public void testAsMapEmpty() {
    Set<String> strings = ImmutableSet.of();
    Map<String, Integer> map = Maps.asMap(strings, LENGTH_FUNCTION);

    for (Entry<K, V> entry : entries) {
      resetContainer();

      K key = entry.getKey();
      V value = entry.getValue();
      Collection<V> collection = multimap().asMap().get(key);
      assertNotNull(collection);
      Collection<V> expectedCollection = copyToList(collection);

      multimap().remove(key, value);
      expectedCollection.remove(value);

    for (Entry<K, V> entry : entries) {
      resetContainer();

      K key = entry.getKey();
      V value = entry.getValue();
      Collection<V> collection = multimap().asMap().get(key);
      assertNotNull(collection);
      Collection<V> expectedCollection = copyToList(collection);

      multimap().remove(key, value);
      expectedCollection.remove(value);

    new EqualsTester()
        .addEqualityGroup(multimap())
        .addEqualityGroup(getSubjectGenerator().create())
        .testEquals();
  }

  public void testHashCodeMatchesAsMap() {
    assertEquals(multimap().asMap().hashCode(), multimap().hashCode());
  }

    assertThat(loader.getLoadCount()).isEqualTo(expectedLoads);
    assertThat(loader.getReloadCount()).isEqualTo(expectedReloads);

    // write to 1 to delay its refresh
    cache.asMap().put(1, -1);
    ticker.advance(1, MILLISECONDS);
    assertThat(cache.getUnchecked(0)).isEqualTo(1);
    assertThat(cache.getUnchecked(1)).isEqualTo(-1);
    assertThat(cache.getUnchecked(2)).isEqualTo(2);

              new SetMultimapTestSuiteBuilder.MultimapAsMapGetGenerator<K, V>(
                  parentBuilder.getSubjectGenerator()))
          .withFeatures(features)
          .named(parentBuilder.getName() + ".asMap[].get[key]")
          .suppressing(parentBuilder.getSuppressedTests())
          .createTestSuite();
    }
  }

    assertThat(loader.getLoadCount()).isEqualTo(expectedLoads);
    assertThat(loader.getReloadCount()).isEqualTo(expectedReloads);

    // write to 1 to delay its refresh
    cache.asMap().put(1, -1);
    ticker.advance(1, MILLISECONDS);
    assertThat(cache.getUnchecked(0)).isEqualTo(1);
    assertThat(cache.getUnchecked(1)).isEqualTo(-1);
    assertThat(cache.getUnchecked(2)).isEqualTo(2);

            .createTestSuite());
    suite.addTestSuite(ImmutableEnumMapTest.class);
    return suite;
  }

  public void testIteratesOnce() {
    Map<AnEnum, AnEnum> map =
        Maps.asMap(
            ImmutableSet.of(AnEnum.A),
            new Function<AnEnum, AnEnum>() {
              boolean used = false;

              @Override
              public AnEnum apply(AnEnum ae) {

   * access. Access time is reset by all cache read and write operations (including {@code
   * Cache.asMap().get(Object)} and {@code Cache.asMap().put(K, V)}), but not by {@code
   * containsKey(Object)}, nor by operations on the collection-views of {@link Cache#asMap}}. So,
   * for example, iterating through {@code Cache.asMap().entrySet()} does not reset access time for
   * the entries you retrieve.
   *