}

    @Override
    @CheckForNull
    C leastValueAbove(DiscreteDomain<C> domain) {
      return domain.next(endpoint);
    }

    @Override
    C greatestValueBelow(DiscreteDomain<C> domain) {
      return endpoint;
    }

    @Override
    Cut<C> canonical(DiscreteDomain<C> domain) {
      C next = leastValueAbove(domain);
      return (next != null) ? belowValue(next) : Cut.<C>aboveAll();

    }

    @Override
    @CheckForNull
    C leastValueAbove(DiscreteDomain<C> domain) {
      return domain.next(endpoint);
    }

    @Override
    C greatestValueBelow(DiscreteDomain<C> domain) {
      return endpoint;
    }

    @Override
    Cut<C> canonical(DiscreteDomain<C> domain) {
      C next = leastValueAbove(domain);
      return (next != null) ? belowValue(next) : Cut.<C>aboveAll();

       * requireNonNull is safe because the effectiveRange operations above would have thrown or
       * effectiveRange.isEmpty() would have returned true.
       */
      C afterLower = requireNonNull(range.lowerBound.leastValueAbove(domain));
      C beforeUpper = requireNonNull(range.upperBound.greatestValueBelow(domain));
      // Per class spec, we are allowed to throw CCE if necessary
      empty = Range.compareOrThrow(afterLower, beforeUpper) > 0;

    return false;
  }

  @Override
  public C first() {
    // requireNonNull is safe because we checked the range is not empty in ContiguousSet.create.
    return requireNonNull(range.lowerBound.leastValueAbove(domain));
  }

  @Override
  public C last() {
    // requireNonNull is safe because we checked the range is not empty in ContiguousSet.create.

       * requireNonNull is safe because the effectiveRange operations above would have thrown or
       * effectiveRange.isEmpty() would have returned true.
       */
      C afterLower = requireNonNull(range.lowerBound.leastValueAbove(domain));
      C beforeUpper = requireNonNull(range.upperBound.greatestValueBelow(domain));
      // Per class spec, we are allowed to throw CCE if necessary
      empty = Range.compareOrThrow(afterLower, beforeUpper) > 0;