template <typename Range, typename... RangeTs>
size_t Size(Range&& range, RangeTs&&... ranges) {
  return range.size() + Size(std::forward<RangeTs>(ranges)...);
}

// Concats all elements in `ranges` and returns a small vector as a result.
template <typename ValueT, typename... RangeTs>
llvm::SmallVector<ValueT, 4> Concat(RangeTs&&... ranges) {
  llvm::SmallVector<int64_t, 4> results;

     *         <code>null</code>. If it is <code>null</code>, the specified version range's recommended
     *         version is used (provided it is non-<code>null</code>). If no recommended version can be
     *         obtained, the returned version range's recommended version is set to <code>null</code>.
     *         </p>

   * not encompass ranges of the form {@code (v..v)}, because such ranges are <i>invalid</i> and
   * can't be constructed at all.)
   *
   * <p>Note that certain discrete ranges such as the integer range {@code (3..4)} are <b>not</b>
   * considered empty, even though they contain no actual values. In these cases, it may be helpful
   * to preprocess ranges with {@link #canonical(DiscreteDomain)}.
   */

   * not encompass ranges of the form {@code (v..v)}, because such ranges are <i>invalid</i> and
   * can't be constructed at all.)
   *
   * <p>Note that certain discrete ranges such as the integer range {@code (3..4)} are <b>not</b>
   * considered empty, even though they contain no actual values. In these cases, it may be helpful
   * to preprocess ranges with {@link #canonical(DiscreteDomain)}.
   */

	coalescesDown := i > 0 && a.ranges[i-1].limit.equal(r.base)
	coalescesUp := i < len(a.ranges) && r.limit.equal(a.ranges[i].base)
	if coalescesUp && coalescesDown {
		// We have neighbors and they both border us.
		// Merge a.ranges[i-1], r, and a.ranges[i] together into a.ranges[i-1].
		a.ranges[i-1].limit = a.ranges[i].limit

		// Delete a.ranges[i].
		copy(a.ranges[i:], a.ranges[i+1:])
		a.ranges = a.ranges[:len(a.ranges)-1]

  ImmutableRangeSet(ImmutableList<Range<C>> ranges) {
    this.ranges = ranges;
  }

  private ImmutableRangeSet(ImmutableList<Range<C>> ranges, ImmutableRangeSet<C> complement) {
    this.ranges = ranges;
    this.complement = complement;
  }

  private final transient ImmutableList<Range<C>> ranges;

  @Override
  public boolean intersects(Range<C> otherRange) {
    int ceilingIndex =
        SortedLists.binarySearch(

  ImmutableRangeSet(ImmutableList<Range<C>> ranges) {
    this.ranges = ranges;
  }

  private ImmutableRangeSet(ImmutableList<Range<C>> ranges, ImmutableRangeSet<C> complement) {
    this.ranges = ranges;
    this.complement = complement;
  }

  private final transient ImmutableList<Range<C>> ranges;

  @Override
  public boolean intersects(Range<C> otherRange) {
    int ceilingIndex =
        SortedLists.binarySearch(

    } else {
      Range<K> range = ranges.get(index);
      return range.contains(key) ? Maps.immutableEntry(range, values.get(index)) : null;
    }
  }

  @Override
  public Range<K> span() {
    if (ranges.isEmpty()) {
      throw new NoSuchElementException();
    }
    Range<K> firstRange = ranges.get(0);
    Range<K> lastRange = ranges.get(ranges.size() - 1);

	}
}

// unifyCallRanges ensures that the ranges for a given inline
// transitively include all of the ranges for its child inlines.
func unifyCallRanges(inlcalls dwarf.InlCalls, idx int) {
	ic := &inlcalls.Calls[idx]
	for _, childIdx := range ic.Children {
		// First make sure child ranges are unified.
		unifyCallRanges(inlcalls, childIdx)

		// Then merge child ranges into ranges for this inline.
		cic := inlcalls.Calls[childIdx]

	ranges, ok := v.ranges[r]
	return ok && slices.Contains(ranges, name)
}

func (v *Validator) addRange(r trace.ResourceID, name string) {
	ranges, _ := v.ranges[r]
	ranges = append(ranges, name)
	v.ranges[r] = ranges
}

func (v *Validator) hasAnyRange(r trace.ResourceID) bool {
	ranges, ok := v.ranges[r]
	return ok && len(ranges) != 0
}