import org.jspecify.annotations.Nullable;

/**
 * Implementation of {@link Multisets#unmodifiableSortedMultiset(SortedMultiset)}, split out into
 * its own file so it can be GWT emulated (to deal with the differing elementSet() types in GWT and
 * non-GWT).
 *
 * @author Louis Wasserman
 */
@GwtCompatible
final class UnmodifiableSortedMultiset<E extends @Nullable Object> extends UnmodifiableMultiset<E>
    implements SortedMultiset<E> {

    return new TestStringMultisetGenerator() {
      @Override
      protected Multiset<String> create(String[] elements) {
        return Multisets.unmodifiableSortedMultiset(TreeMultiset.create(asList(elements)));
      }

      @Override
      public List<String> order(List<String> insertionOrder) {
        sort(insertionOrder);
        return insertionOrder;
      }

    return new TestStringMultisetGenerator() {
      @Override
      protected Multiset<String> create(String[] elements) {
        return Multisets.unmodifiableSortedMultiset(TreeMultiset.create(asList(elements)));
      }

      @Override
      public List<String> order(List<String> insertionOrder) {
        sort(insertionOrder);
        return insertionOrder;
      }