}

  /** Returns an immutable sorted set containing a single element. */
  public static <E extends Comparable<? super E>> ImmutableSortedSet<E> of(E e1) {
    return new RegularImmutableSortedSet<>(ImmutableList.of(e1), Ordering.natural());
  }

  /**
   * Returns an immutable sorted set containing the given elements sorted by their natural ordering.

     */
    @Nonnull
    List<Version> getVersions();

    /**
     * Gets the lowest version matching the requested range.
     *
     * @return An Optional containing the lowest matching version, or empty Optional if no versions
     *         matched the requested range
     */
    @Nonnull
    default Optional<Version> getLowestVersion() {
        return getVersions().isEmpty()

    /**
     * Retrieves a paginated list of groups based on the provided pager criteria.
     * Updates the pager with pagination information including page numbers and ranges.
     *
     * @param groupPager the pager containing pagination and search criteria
     * @return a list of groups matching the criteria
     */
    public List<Group> getGroupList(final GroupPager groupPager) {

    }

    /**
     * Returns the default flags for a generic Type-2 message in the
     * current environment.
     *
     * @param tc
     *            context to use
     * @return An <code>int</code> containing the default flags.
     */
    public static int getDefaultFlags(final CIFSContext tc) {
        return NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_VERSION

import com.google.common.collect.testing.SampleElements.Unhashables;
import java.util.Collection;
import java.util.List;
import org.jspecify.annotations.NullMarked;

/**
 * Creates collections containing unhashable sample elements, to be tested.
 *
 * @author Regina O'Dell
 */
@GwtCompatible
@NullMarked
public abstract class TestUnhashableCollectionGenerator<T extends Collection<UnhashableObject>>

     * Provides database access methods for DuplicateHost entities.
     */
    @Resource
    protected DuplicateHostBhv duplicateHostBhv;

    /**
     * Fess configuration containing application settings.
     * Used to retrieve paging and other configuration parameters.
     */
    @Resource
    protected FessConfig fessConfig;

    /**
     * Creates a new instance of DuplicateHostService.

    /**
     * Key used for facet count aggregations.
     */
    public static final String FACET_COUNT_KEY = "count";

    /**
     * Map containing crawling information parameters.
     */
    protected Map<String, String> infoMap;

    /**
     * Document expiration time in milliseconds.
     */
    protected Long documentExpires;

    /**

    return new CopyOnWriteArrayList<>();
  }

  /**
   * Creates a {@code CopyOnWriteArrayList} instance containing the given elements.
   *
   * @param elements the elements that the list should contain, in order
   * @return a new {@code CopyOnWriteArrayList} containing those elements
   * @since 12.0
   */
  @J2ktIncompatible
  @GwtIncompatible // CopyOnWriteArrayList

     * within the context of the specified dictionary.
     * </p>
     *
     * @param dictId the dictionary ID containing the character mapping item
     * @param id the unique identifier of the character mapping item
     * @return an OptionalEntity containing the character mapping item if found, empty otherwise
     */

  /**
   * Returns an unmodifiable map containing the entries from the left map whose keys are not present
   * in the right map.
   */
  Map<K, V> entriesOnlyOnLeft();

  /**
   * Returns an unmodifiable map containing the entries from the right map whose keys are not
   * present in the left map.
   */
  Map<K, V> entriesOnlyOnRight();

  /**