}

  /**
   * Returns {@link SetMultimap#asMap multimap.asMap()}, with its type corrected from {@code Map<K,
   * Collection<V>>} to {@code Map<K, Set<V>>}.
   *
   * @since 15.0
   */
  @SuppressWarnings("unchecked")
  // safe by specification of SetMultimap.asMap()
  public static <K extends @Nullable Object, V extends @Nullable Object> Map<K, Set<V>> asMap(

  }

  /**
   * Returns {@link SetMultimap#asMap multimap.asMap()}, with its type corrected from {@code Map<K,
   * Collection<V>>} to {@code Map<K, Set<V>>}.
   *
   * @since 15.0
   */
  @SuppressWarnings("unchecked")
  // safe by specification of SetMultimap.asMap()
  public static <K extends @Nullable Object, V extends @Nullable Object> Map<K, Set<V>> asMap(

    cache.asMap().put(extraKey, extraKey);
    assertSame(extraKey, cache.asMap().get(extraKey));

    Object[] lookupKeys = new Object[] {new Object(), new Object(), new Object()};
    assertThrows(InvalidCacheLoadException.class, () -> cache.getAll(asList(lookupKeys)));

    for (Object key : lookupKeys) {
      assertTrue(cache.asMap().containsKey(key));
    }

   * 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.
   *