Iterable<E> elements, Comparator<? super E> comparator) {
    return new OrderedPermutationCollection<E>(elements, comparator);
  }

  private static final class OrderedPermutationCollection<E> extends AbstractCollection<List<E>> {
    final ImmutableList<E> inputList;
    final Comparator<? super E> comparator;
    final int size;

    OrderedPermutationCollection(Iterable<E> input, Comparator<? super E> comparator) {

      implements Supplier<SortedSet<V>>, Serializable {
    private final Comparator<? super V> comparator;

    TreeSetSupplier(Comparator<? super V> comparator) {
      this.comparator = checkNotNull(comparator);
    }

    @Override
    public SortedSet<V> get() {
      return new TreeSet<>(comparator);
    }
  }

  private static final class EnumSetSupplier<V extends Enum<V>>

      implements Supplier<SortedSet<V>>, Serializable {
    private final Comparator<? super V> comparator;

    TreeSetSupplier(Comparator<? super V> comparator) {
      this.comparator = checkNotNull(comparator);
    }

    @Override
    public SortedSet<V> get() {
      return new TreeSet<>(comparator);
    }
  }

  private static final class EnumSetSupplier<V extends Enum<V>>

      return notSubtype(shop);
    }

    @TestSubtype(suppressGetSubtype = true)
    public Comparator<Electronics> supertypeIsTopLevelClass(
        Mall<Indoor>.Retailer<Electronics> shop) {
      return isSubtype(shop);
    }

    @TestSubtype
    public Comparator<Electronics> topLevelClassIsNotSupertypeDueToTypeParameter(
        Mall<Indoor>.Retailer<Grocery> shop) {

   *
   * @since 2.0
   */
  public static Comparator<byte[]> lexicographicalComparator() {
    return LexicographicalComparatorHolder.BEST_COMPARATOR;
  }

  @VisibleForTesting
  static Comparator<byte[]> lexicographicalComparatorJavaImpl() {
    return LexicographicalComparatorHolder.PureJavaComparator.INSTANCE;
  }

  /** Provides a lexicographical comparator implementation selected based on the current runtime. */

 * invoke methods, they invoke methods on the {@code ForwardingSortedSet}.
 *
 * <p>Each of the {@code standard} methods, where appropriate, uses the set's comparator (or the
 * natural ordering of the elements, if there is no comparator) to test element equality. As a
 * result, if the comparator is not consistent with equals, some of the standard implementations may
 * violate the {@code Set} contract.
 *

import java.io.Serializable;
import java.util.Comparator;
import java.util.Iterator;
import org.jspecify.annotations.Nullable;

/** An ordering which sorts iterables by comparing corresponding elements pairwise. */
@GwtCompatible
final class LexicographicalOrdering<T extends @Nullable Object> extends Ordering<Iterable<T>>
    implements Serializable {
  final Comparator<? super T> elementOrder;

import java.io.Serializable;
import java.util.Comparator;
import java.util.Iterator;
import org.jspecify.annotations.Nullable;

/** An ordering which sorts iterables by comparing corresponding elements pairwise. */
@GwtCompatible
final class LexicographicalOrdering<T extends @Nullable Object> extends Ordering<Iterable<T>>
    implements Serializable {
  final Comparator<? super T> elementOrder;

   * MultimapBuilder#treeKeys()}, may make additional guarantees.
   */
  @Override
  Map<K, Collection<V>> asMap();

  /**
   * Returns the comparator that orders the multimap values, with {@code null} indicating that
   * natural ordering is used.
   */
  @Nullable Comparator<? super V> valueComparator();

    }

    @Override
    public Iterator<E> iterator() {
      return Multisets.elementIterator(multiset().entrySet().iterator());
    }

    @Override
    public Comparator<? super E> comparator() {
      return multiset().comparator();
    }

    @Override
    public SortedSet<E> subSet(@ParametricNullness E fromElement, @ParametricNullness E toElement) {