*/
  public static <E> ImmutableSortedMultiset<E> copyOfSorted(SortedMultiset<E> sortedMultiset) {
    return copyOfSortedEntries(
        sortedMultiset.comparator(), new ArrayList<>(sortedMultiset.entrySet()));
  }

  private static <E> ImmutableSortedMultiset<E> copyOfSortedEntries(
      Comparator<? super E> comparator, Collection<Entry<E>> entries) {
    if (entries.isEmpty()) {