if (from == to) {
      return emptyMultiset(comparator());
    } else if (from == 0 && to == length) {
      return this;
    } else {
      RegularImmutableSortedSet<E> subElementSet = elementSet.getSubSet(from, to);
      return new RegularImmutableSortedMultiset<>(
          subElementSet, cumulativeCounts, offset + from, to - from);
    }
  }

  @Override
  boolean isPartialView() {