*
     * @param artifact The artifact whose available versions should be determined, must not be {@code null}.
     * @return The available versions of the artifact or an empty list if none, never {@code null}.
     * @since 3.0-alpha-3
     */
    List<String> findVersions(Artifact artifact);

    /**

      int k, Comparator<? super T> comparator) {
    return least(k, comparator.reversed());
  }

  /**
   * Returns a comparator of {@link Optional} values which treats {@link Optional#empty} as less
   * than all other values, and orders the rest using {@code valueComparator} on the contained
   * value.
   *
   * @since 22.0 (but only since 33.4.0 in the Android flavor)
   */

    @Test
    public void test_isValidVirtualHostPath_emptyPath() throws Exception {
        setupVirtualHostHelper();

        Boolean result = invokeIsValidVirtualHostPath("");
        assertTrue("Empty path should be valid (default host)", result);
    }

    @Test
    public void test_isValidVirtualHostPath_nullPath() throws Exception {
        setupVirtualHostHelper();

        OptionalEntity<String> emptyOptional = OptionalUtil.ofNullable(nullValue);

        assertFalse(emptyOptional.isPresent());
        assertEquals("default", emptyOptional.orElse("default"));

        // Test that empty optional returns null instead of throwing
        assertNull(emptyOptional.orElse(null));
    }

    @Test
    public void test_ofNullable_multipleTypesInSequence() {

        }
    }

    // Test getScriptEngine with empty string
    @Test
    public void test_getScriptEngine_emptyString() {
        try {
            scriptEngineFactory.getScriptEngine("");
            fail("Should throw ScriptEngineException for empty string");
        } catch (ScriptEngineException e) {
            assertEquals(" is not found.", e.getMessage());

 *
 * @author Louis Wasserman
 */
@GwtIncompatible // not worth using in GWT for now
final class CompactLinkedHashSet<E extends @Nullable Object> extends CompactHashSet<E> {

  /** Creates an empty {@code CompactLinkedHashSet} instance. */
  public static <E extends @Nullable Object> CompactLinkedHashSet<E> create() {
    return new CompactLinkedHashSet<>();
  }

  /**

 *
 * @author Louis Wasserman
 */
@GwtIncompatible // not worth using in GWT for now
final class CompactLinkedHashSet<E extends @Nullable Object> extends CompactHashSet<E> {

  /** Creates an empty {@code CompactLinkedHashSet} instance. */
  public static <E extends @Nullable Object> CompactLinkedHashSet<E> create() {
    return new CompactLinkedHashSet<>();
  }

  /**

        }
        return logger;
    }

    /**
     * Returns a formatted message string.
     *
     * @param messageCode
     *            Message code. Must not be {@literal null} or empty string.
     * @param args
     *            Arguments
     * @return Formatted message string
     */
    public static LogMessage format(final String messageCode, final Object... args) {

    }

    public FessUser getFessUser() {
        return user;
    }

    public static FessUserBean empty() {
        return new FessUserBean(null) {
            private static final long serialVersionUID = 1L;

            @Override
            public String getUserId() {
                return Constants.EMPTY_USER_ID;

import java.util.Comparator;
import java.util.Spliterator;
import org.jspecify.annotations.Nullable;

/**
 * List returned by {@code ImmutableSortedSet.asList()} when the set isn't empty.
 *
 * @author Jared Levy
 * @author Louis Wasserman
 */
@GwtCompatible
@SuppressWarnings("serial")
final class ImmutableSortedAsList<E> extends RegularImmutableAsList<E>
    implements SortedIterable<E> {