*/
@GwtCompatible
abstract class AbstractSortedSetMultimap<K extends @Nullable Object, V extends @Nullable Object>
    extends AbstractSetMultimap<K, V> implements SortedSetMultimap<K, V> {
  /**
   * Creates a new multimap that uses the provided map.
   *
   * @param map place to store the mapping from each key to its corresponding values
   */
  protected AbstractSortedSetMultimap(Map<K, Collection<V>> map) {
    super(map);
  }

 *
 * @author Louis Wasserman
 */
@GwtCompatible
abstract class AbstractSortedKeySortedSetMultimap<
        K extends @Nullable Object, V extends @Nullable Object>
    extends AbstractSortedSetMultimap<K, V> {

  AbstractSortedKeySortedSetMultimap(SortedMap<K, Collection<V>> map) {
    super(map);
  }

  @Override
  public SortedMap<K, Collection<V>> asMap() {

    return new CustomSortedSetMultimap<>(map, factory);
  }

  private static final class CustomSortedSetMultimap<
          K extends @Nullable Object, V extends @Nullable Object>
      extends AbstractSortedSetMultimap<K, V> {
    transient Supplier<? extends SortedSet<V>> factory;
    transient @Nullable Comparator<? super V> valueComparator;

    return new CustomSortedSetMultimap<>(map, factory);
  }

  private static final class CustomSortedSetMultimap<
          K extends @Nullable Object, V extends @Nullable Object>
      extends AbstractSortedSetMultimap<K, V> {
    transient Supplier<? extends SortedSet<V>> factory;
    transient @Nullable Comparator<? super V> valueComparator;