return multiset().comparator();
    }

    @Override
    public SortedSet<E> subSet(@ParametricNullness E fromElement, @ParametricNullness E toElement) {
      return multiset().subMultiset(fromElement, CLOSED, toElement, OPEN).elementSet();
    }

    @Override
    public SortedSet<E> headSet(@ParametricNullness E toElement) {
      return multiset().headMultiset(toElement, OPEN).elementSet();
    }

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

  @Override
  SortedSet<E> createElementSet() {
    return Collections.unmodifiableSortedSet(delegate().elementSet());
  }

  @Override
  public SortedSet<E> elementSet() {
    return (SortedSet<E>) super.elementSet();
  }

  private transient @Nullable UnmodifiableSortedMultiset<E> descendingMultiset;

  @Override

public class SortedSetNavigationTester<E extends @Nullable Object> extends AbstractSetTester<E> {

  private SortedSet<E> sortedSet;
  private List<E> values;
  private @Nullable E a;
  private @Nullable E b;
  private @Nullable E c;

  @Override
  public void setUp() throws Exception {
    super.setUp();
    sortedSet = (SortedSet<E>) getSet();
    values =
        copyToList(
            getSubjectGenerator()

  }

  private static <E extends @Nullable Object> SortedSet<E> sortedSet(
      SortedSet<E> set, @Nullable Object mutex) {
    return new SynchronizedSortedSet<>(set, mutex);
  }

  static class SynchronizedSortedSet<E extends @Nullable Object> extends SynchronizedSet<E>
      implements SortedSet<E> {
    SynchronizedSortedSet(SortedSet<E> delegate, @Nullable Object mutex) {
      super(delegate, mutex);
    }

        }
      }
    }

  private suspend fun readImportResults(): ImportResults =
    withContext(Dispatchers.IO) {
      val sortedRules: SortedSet<ByteString> = TreeSet()
      val sortedExceptionRules: SortedSet<ByteString> = TreeSet()
      var totalRuleBytes = 0
      var totalExceptionRuleBytes = 0

      fileSystem.source(publicSuffixListDotDat).buffer().use { source ->

    Comparator<?> comparator2;
    if (elements instanceof SortedSet) {
      comparator2 = comparator((SortedSet<?>) elements);
    } else if (elements instanceof SortedIterable) {
      comparator2 = ((SortedIterable<?>) elements).comparator();
    } else {
      return false;
    }
    return comparator.equals(comparator2);
  }

  @SuppressWarnings("unchecked")
  // if sortedSet.comparator() is null, the set must be naturally ordered

  }

  private static <E extends @Nullable Object> SortedSet<E> sortedSet(
      SortedSet<E> set, @Nullable Object mutex) {
    return new SynchronizedSortedSet<>(set, mutex);
  }

  static class SynchronizedSortedSet<E extends @Nullable Object> extends SynchronizedSet<E>
      implements SortedSet<E> {
    SynchronizedSortedSet(SortedSet<E> delegate, @Nullable Object mutex) {
      super(delegate, mutex);
    }

      allEntries.addAll(extremeValues);
      allEntries.addAll(normalValues);
      SortedSet<E> set = delegate.create(allEntries.toArray());

      return createSubSet(set, firstExclusive, lastExclusive);
    }

    /** Calls the smallest subSet overload that filters out the extreme values. */
    SortedSet<E> createSubSet(SortedSet<E> set, E firstExclusive, E lastExclusive) {

        delegate.subSet(
            checkValid(fromElement), fromInclusive, checkValid(toElement), toInclusive));
  }

  @Override
  public SortedSet<E> subSet(E fromElement, E toElement) {
    return subSet(fromElement, true, toElement, false);
  }

  @Override
  public SortedSet<E> tailSet(E fromElement) {
    return tailSet(fromElement, true);
  }

  @Override

    if (result == null) {
      return comparator = Ordering.from(forwardMultiset().comparator()).reverse();
    }
    return result;
  }

  @Nullable private transient SortedSet<E> elementSet;

  @Override
  public SortedSet<E> elementSet() {
    SortedSet<E> result = elementSet;
    if (result == null) {
      return elementSet = new SortedMultisets.ElementSet<E>(this);
    }
    return result;
  }

  @Override