* #entriesOnlyOnLeft()}, {@link #entriesOnlyOnRight()}, {@link #entriesInCommon()} and {@link
   * #entriesDiffering()} of the two instances are equal.
   */
  @Override
  boolean equals(@Nullable Object object);

  /**
   * Returns the hash code for this instance. This is defined as the hash code of
   *
   * {@snippet :
   * Arrays.asList(entriesOnlyOnLeft(), entriesOnlyOnRight(),
   *     entriesInCommon(), entriesDiffering())

public interface SortedMapDifference<K extends @Nullable Object, V extends @Nullable Object>
    extends MapDifference<K, V> {

  @Override
  SortedMap<K, V> entriesOnlyOnLeft();

  @Override
  SortedMap<K, V> entriesOnlyOnRight();

  @Override
  SortedMap<K, V> entriesInCommon();

  @Override
  SortedMap<K, ValueDifference<V>> entriesDiffering();

public interface SortedMapDifference<K extends @Nullable Object, V extends @Nullable Object>
    extends MapDifference<K, V> {

  @Override
  SortedMap<K, V> entriesOnlyOnLeft();

  @Override
  SortedMap<K, V> entriesOnlyOnRight();

  @Override
  SortedMap<K, V> entriesInCommon();

  @Override
  SortedMap<K, ValueDifference<V>> entriesDiffering();