return 0;
  }

  @Override
  public boolean equals(@CheckForNull Object object) {
    if (object == this) {
      return true;
    }
    if (object instanceof LexicographicalOrdering) {
      LexicographicalOrdering<?> that = (LexicographicalOrdering<?>) object;
      return this.elementOrder.equals(that.elementOrder);
    }
    return false;
  }

  @Override
  public int hashCode() {

    return 0;
  }

  @Override
  public boolean equals(@CheckForNull Object object) {
    if (object == this) {
      return true;
    }
    if (object instanceof LexicographicalOrdering) {
      LexicographicalOrdering<?> that = (LexicographicalOrdering<?>) object;
      return this.elementOrder.equals(that.elementOrder);
    }
    return false;
  }

  @Override
  public int hashCode() {

  // think tip it over into being worthwhile.
  public static <T extends @Nullable Object, S extends T> Comparator<Iterable<S>> lexicographical(
      Comparator<T> comparator) {
    return new LexicographicalOrdering<S>(checkNotNull(comparator));
  }

  /**
   * Returns {@code true} if each element in {@code iterable} after the first is greater than or

  // think tip it over into being worthwhile.
  public static <T extends @Nullable Object, S extends T> Comparator<Iterable<S>> lexicographical(
      Comparator<T> comparator) {
    return new LexicographicalOrdering<S>(checkNotNull(comparator));
  }

  /**
   * Returns {@code true} if each element in {@code iterable} after the first is greater than or

     * Iterable<? extends S>}. However, the need for this comes up so rarely
     * that it doesn't justify making everyone else deal with the very ugly
     * wildcard.
     */
    return new LexicographicalOrdering<S>(this);
  }

  // Regular instance methods

  @Override
  public abstract int compare(@ParametricNullness T left, @ParametricNullness T right);

  /**

     * Iterable<? extends S>}. However, the need for this comes up so rarely
     * that it doesn't justify making everyone else deal with the very ugly
     * wildcard.
     */
    return new LexicographicalOrdering<S>(this);
  }

  // Regular instance methods

  @Override
  public abstract int compare(@ParametricNullness T left, @ParametricNullness T right);

  /**