}

    @Override
    public int hashCode() {
      return identity;
    }

    @Override
    public boolean equals(@Nullable Object obj) {
      if (obj instanceof FreshInvocationHandler) {
        FreshInvocationHandler that = (FreshInvocationHandler) obj;
        return identity == that.identity;
      }
      return false;
    }

    @Override
    public String toString() {

        UnsignedLong ul,
        StringBuilder sb,
        Predicate<?> pred,
        Function<?, ?> func,
        Object obj) {
      delegate.foo(
          s, r, n, it, b, eq, e, in, c, ord, charset, unit, cls, joiner, pattern, ui, ul, sb, pred,
          func, obj);
    }

    @Override
    public String toString() {
      return delegate.toString();
    }
  }

  }

  @Override
  public abstract boolean encloses(Range<C> otherRange);

  @Override
  public boolean equals(@CheckForNull Object obj) {
    if (obj == this) {
      return true;
    } else if (obj instanceof RangeSet) {
      RangeSet<?> other = (RangeSet<?>) obj;
      return this.asRanges().equals(other.asRanges());
    }
    return false;
  }

  @Override
  public final int hashCode() {

    return new GeneralRange<>(comparator, hasLowBound, lowEnd, lowType, hasUpBound, upEnd, upType);
  }

  @Override
  public boolean equals(@CheckForNull Object obj) {
    if (obj instanceof GeneralRange) {
      GeneralRange<?> r = (GeneralRange<?>) obj;
      return comparator.equals(r.comparator)
          && hasLowerBound == r.hasLowerBound
          && hasUpperBound == r.hasUpperBound

    InvocationHandler handler =
        new InvocationHandler() {
          @Override
          @CheckForNull
          public Object invoke(Object obj, Method method, @CheckForNull @Nullable Object[] args)
              throws Throwable {
            Callable<@Nullable Object> callable =
                () -> {
                  try {

  }

  private static final Function<Object, Optional<?>> NULLABLE_TO_OPTIONAL =
      new Function<Object, Optional<?>>() {
        @Override
        public Optional<?> apply(@Nullable Object obj) {
          return Optional.fromNullable(obj);
        }
      };

  private static final Function<Optional<?>, @Nullable Object> OPTIONAL_TO_NULLABLE =
      new Function<Optional<?>, @Nullable Object>() {
        @Override

      this.closeable = closeable;
      this.thrown = thrown;
      this.suppressed = suppressed;
    }

    @Override
    public boolean equals(@Nullable Object obj) {
      if (obj instanceof Suppression) {
        Suppression other = (Suppression) obj;
        return closeable.equals(other.closeable)
            && thrown.equals(other.thrown)
            && suppressed.equals(other.suppressed);
      }
      return false;

  }

  private static void containsExactlySanityCheck(Collection<?> collection, Object... varargs) {
    assertThat(collection).hasSize(varargs.length);
    for (Object obj : varargs) {
      assertThat(collection).contains(obj);
    }
    assertThat(collection).containsExactly(varargs);
  }

  }

  private static void containsExactlySanityCheck(Collection<?> collection, Object... varargs) {
    assertThat(collection).hasSize(varargs.length);
    for (Object obj : varargs) {
      assertThat(collection).contains(obj);
    }
    assertThat(collection).containsExactly(varargs);
  }

   */
  void removeAll(Iterable<Range<C>> ranges);

  // Object methods

  /**
   * Returns {@code true} if {@code obj} is another {@code RangeSet} that contains the same ranges
   * according to {@link Range#equals(Object)}.
   */
  @Override
  boolean equals(@CheckForNull Object obj);

  /** Returns {@code asRanges().hashCode()}. */
  @Override
  int hashCode();

  /**