toElement, BoundType.forBoolean(toInclusive)));
  }

  @Override
  ContiguousSet<C> tailSetImpl(C fromElement, boolean inclusive) {
    return intersectionInCurrentDomain(Range.downTo(fromElement, BoundType.forBoolean(inclusive)));
  }

  @GwtIncompatible // not used by GWT emulation
  @Override
  int indexOf(@Nullable Object target) {
    if (!contains(target)) {
      return -1;
    }

  }

  public void testEquivalentFactories() {
    new EqualsTester()
        .addEqualityGroup(Range.all())
        .addEqualityGroup(Range.atLeast(1), Range.downTo(1, CLOSED))
        .addEqualityGroup(Range.greaterThan(1), Range.downTo(1, OPEN))
        .addEqualityGroup(Range.atMost(7), Range.upTo(7, CLOSED))
        .addEqualityGroup(Range.lessThan(7), Range.upTo(7, OPEN))

  }

  /**
   * Returns everything above the endpoint relative to the specified comparator, with the specified
   * endpoint behavior.
   */
  static <T extends @Nullable Object> GeneralRange<T> downTo(
      Comparator<? super T> comparator, @ParametricNullness T endpoint, BoundType boundType) {
    return new GeneralRange<>(comparator, true, endpoint, boundType, false, null, OPEN);
  }

  /**

  }

  /**
   * Returns everything above the endpoint relative to the specified comparator, with the specified
   * endpoint behavior.
   */
  static <T extends @Nullable Object> GeneralRange<T> downTo(
      Comparator<? super T> comparator, @ParametricNullness T endpoint, BoundType boundType) {
    return new GeneralRange<>(comparator, true, endpoint, boundType, false, null, OPEN);
  }

  /**

    rangesBuilder.add(Range.<Integer>all());
    for (int i = -2; i <= 2; i++) {
      for (BoundType boundType : BoundType.values()) {
        rangesBuilder.add(Range.upTo(i, boundType));
        rangesBuilder.add(Range.downTo(i, boundType));
      }
      for (int j = i + 1; j <= 2; j++) {
        for (BoundType lbType : BoundType.values()) {
          for (BoundType ubType : BoundType.values()) {

    for (int i = MIN_BOUND; i <= MAX_BOUND; i++) {
      for (BoundType boundType : BoundType.values()) {
        queryBuilder.add(Range.upTo(i, boundType));
        queryBuilder.add(Range.downTo(i, boundType));
      }
      queryBuilder.add(Range.singleton(i));
      queryBuilder.add(Range.openClosed(i, i));
      queryBuilder.add(Range.closedOpen(i, i));

  /**
   * Returns a range from the given endpoint, which may be either inclusive (closed) or exclusive
   * (open), with no upper bound.
   *
   * @since 14.0
   */
  public static <C extends Comparable<?>> Range<C> downTo(C endpoint, BoundType boundType) {
    switch (boundType) {
      case OPEN:
        return greaterThan(endpoint);
      case CLOSED:
        return atLeast(endpoint);
    }
    throw new AssertionError();

    // Add one-ended ranges
    for (int i = MIN_BOUND; i <= MAX_BOUND; i++) {
      for (BoundType type : BoundType.values()) {
        builder.add(Range.upTo(i, type));
        builder.add(Range.downTo(i, type));
      }
    }

    // Add two-ended ranges
    for (int i = MIN_BOUND; i <= MAX_BOUND; i++) {
      for (int j = i; j <= MAX_BOUND; j++) {
        for (BoundType lowerType : BoundType.values()) {

              toElement, BoundType.forBoolean(toInclusive)));
    }

    @Override
    ImmutableSortedSet<C> tailSetImpl(C fromElement, boolean inclusive) {
      return subSet(Range.downTo(fromElement, BoundType.forBoolean(inclusive)));
    }

    @Override
    public boolean contains(@Nullable Object o) {
      if (o == null) {
        return false;
      }
      try {

  }

  @Override
  public SortedMultiset<E> tailMultiset(@ParametricNullness E lowerBound, BoundType boundType) {
    return new TreeMultiset<>(
        rootReference,
        range.intersect(GeneralRange.downTo(comparator(), lowerBound, boundType)),
        header);
  }

  private static final class Reference<T> {
    private @Nullable T value;

    @Nullable T get() {
      return value;
    }