* SortedSet#comparator()}, which returns {@code null} to indicate natural ordering.
   */
  @Override
  public Comparator<? super E> comparator() {
    return comparator;
  }

  @Override // needed to unify the iterator() methods in Collection and SortedIterable
  public abstract UnmodifiableIterator<E> iterator();

  /**
   * {@inheritDoc}
   *

   * SortedSet#comparator()}, which returns {@code null} to indicate natural ordering.
   */
  @Override
  public Comparator<? super E> comparator() {
    return comparator;
  }

  @Override // needed to unify the iterator() methods in Collection and SortedIterable
  public abstract UnmodifiableIterator<E> iterator();

  /**
   * {@inheritDoc}
   *

    this.sortedDelegate = Collections.unmodifiableSortedSet(sortedDelegate);
  }

  public Comparator<? super E> comparator() {
    return sortedDelegate.comparator();
  }

  @Override // needed to unify SortedIterable and Collection iterator() methods
  public UnmodifiableIterator<E> iterator() {
    return super.iterator();
  }

  @Override
  public Object[] toArray() {
    /*