// Test 32 byte arrays of ascending.
    byte[] ascending = new byte[32];
    for (int i = 0; i < 32; i++) {
      ascending[i] = (byte) i;
    }
    assertCrc(0x46dd794e, ascending);
  }

  public void testDescending() {
    // Test 32 byte arrays of descending.
    byte[] descending = new byte[32];
    for (int i = 0; i < 32; i++) {
      descending[i] = (byte) (31 - i);
    }

  // TODO(b/418181860): This method creates retain cycles in J2ObjC. In order to break the cycle,
  // there needs to be separate classes for primary and descending multiset, where the primary one
  // would hold {@code @LazyInit @RetainedWith @Nullable} reference to its descending multiset, and
  // the other {@code final} reference.
  @Override
  public SortedMultiset<E> descendingMultiset() {

    List<Feature<?>> features = new ArrayList<>();
    features.add(NoRecurse.DESCENDING);
    features.addAll(parentBuilder.getFeatures());

    return subSuiteUsing(new DescendingTestMapGenerator<K, V>(delegate))
        .named(parentBuilder.getName() + " descending")
        .withFeatures(features)
        .suppressing(parentBuilder.getSuppressedTests())
        .createTestSuite();
  }

  }

  @CollectionSize.Require(SEVERAL)
  public void testDescendingNavigation() {
    List<Entry<K, V>> descending = new ArrayList<>(navigableMap.descendingMap().entrySet());
    Collections.reverse(descending);
    assertEquals(entries, descending);
  }

  @CollectionSize.Require(absent = ZERO)
  public void testHeadMapExclusive() {

  }

  @CollectionSize.Require(SEVERAL)
  public void testDescendingNavigation() {
    List<Entry<K, V>> descending = new ArrayList<>(navigableMap.descendingMap().entrySet());
    Collections.reverse(descending);
    assertEquals(entries, descending);
  }

  @CollectionSize.Require(absent = ZERO)
  public void testHeadMapExclusive() {

    List<Feature<?>> features = new ArrayList<>();
    features.add(NoRecurse.DESCENDING);
    features.addAll(parentBuilder.getFeatures());

    return subSuiteUsing(new DescendingTestMapGenerator<K, V>(delegate))
        .named(parentBuilder.getName() + " descending")
        .withFeatures(features)
        .suppressing(parentBuilder.getSuppressedTests())
        .createTestSuite();
  }

  }

  /**
   * To avoid infinite recursion, test suites with these marker features won't have derived suites
   * created for them.
   */
  enum NoRecurse implements Feature<Void> {
    SUBMULTISET,
    DESCENDING;

    @Override
    public Set<Feature<? super Void>> getImpliedFeatures() {
      return emptySet();
    }
  }

  /** Two bounds (from and to) define how to build a subMultiset. */
  enum Bound {

  }

  /**
   * To avoid infinite recursion, test suites with these marker features won't have derived suites
   * created for them.
   */
  enum NoRecurse implements Feature<Void> {
    SUBMULTISET,
    DESCENDING;

    @Override
    public Set<Feature<? super Void>> getImpliedFeatures() {
      return emptySet();
    }
  }

  /** Two bounds (from and to) define how to build a subMultiset. */
  enum Bound {

  }

  /**
   * Returns a {@code TopKSelector} that collects the greatest {@code k} elements added to it,
   * relative to the natural ordering of the elements, and returns them via {@link #topK} in
   * descending order.
   *
   * @throws IllegalArgumentException if {@code k < 0} or {@code k > Integer.MAX_VALUE / 2}
   */
  public static <T extends Comparable<? super T>> TopKSelector<T> greatest(int k) {

import java.util.Comparator;
import java.util.Iterator;
import java.util.Set;
import java.util.SortedSet;
import org.jspecify.annotations.Nullable;

/**
 * A skeleton implementation of a descending multiset. Only needs {@code forwardMultiset()} and
 * {@code entryIterator()}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
abstract class DescendingMultiset<E extends @Nullable Object> extends ForwardingMultiset<E>