return map.isEmpty();
    }

    @Override
    public boolean contains(final Object o) {
        return map.containsKey(o);
    }

    @Override
    public boolean add(final String o) {
        return map.put(o, PRESENT) == null;
    }

    @Override
    public boolean remove(final Object o) {
        return map.remove(o) == PRESENT;
    }

    @Override
    public void clear() {

    protected static final Class<?> suppressUnusedImportLocalDateTime = LocalDateTime.class;

    // ===================================================================================
    //                                                                           Singleton
    //                                                                           =========
    private static final KeyMatchDbm _instance = new KeyMatchDbm();

     */
    public void deleteSearchLog(final Object e) {
        if (e instanceof final ClickLog clickLog) {
            clickLogBhv.delete(clickLog);
        } else if (e instanceof final FavoriteLog favoriteLog) {
            favoriteLogBhv.delete(favoriteLog);
        } else if (e instanceof final UserInfo userInfo) {
            userInfoBhv.delete(userInfo);
        } else if (e instanceof final SearchLog searchLog) {

    }
    return false;
  }

  final @Nullable Object value() {
    return value;
  }

  final @Nullable Listener listeners() {
    return listeners;
  }

  final void releaseWaiters() {}

  AbstractFutureState() {}

  static final Object NULL = new Object();

  static final LazyLogger log = new LazyLogger(AbstractFuture.class);

  static final boolean GENERATE_CANCELLATION_CAUSES = false;

     * @param len the number of bytes to write
     * @param andx the next command in the AndX chain, or null
     */
    public SmbComWriteAndX(final Configuration config, final int fid, final long offset, final int remaining, final byte[] b, final int off,
            final int len, final ServerMessageBlock andx) {
        super(config, SMB_COM_WRITE_ANDX, andx);
        this.fid = fid;
        this.offset = offset;

     */
    @Override
    public void addIncludeUrlFilter(final String sessionId, final List<String> urlList) {
        if (urlList.isEmpty()) {
            return;
        }
        final List<OpenSearchUrlFilter> urlFilterList = new ArrayList<>(urlList.size());
        for (final String url : urlList) {
            final OpenSearchUrlFilter esUrlFilter = new OpenSearchUrlFilter();

    protected static final Class<?> suppressUnusedImportLocalDateTime = LocalDateTime.class;

    // ===================================================================================
    //                                                                           Singleton
    //                                                                           =========
    private static final UserInfoDbm _instance = new UserInfoDbm();

  static final RuntimeException RUNTIME_EXCEPTION = new RuntimeException();
  static final OtherThrowable OTHER_THROWABLE = new OtherThrowable();
  static final Future<String> FAILED_FUTURE_OTHER_THROWABLE =
      immediateFailedFuture(OTHER_THROWABLE);
  static final Error ERROR = new Error("mymessage");
  static final Future<String> FAILED_FUTURE_ERROR = immediateFailedFuture(ERROR);

    }

    /** WAVE DASH */
    public static final char WAVE_DASH = '\u301C';

    /** FULLWIDTH TILDE */
    public static final char FULLWIDTH_TILDE = '\uFF5E';

    /** DOUBLE VERTICAL LINE */
    public static final char DOUBLE_VERTICAL_LINE = '\u2016';

    /** PARALLEL TO */
    public static final char PARALLEL_TO = '\u2225';

    /** MINUS SIGN */
    public static final char MINUS_SIGN = '\u2212';

 * This class cannot be instantiated.
 */
public final class FieldNames {
    /** The unique identifier field. */
    public static final String ID = "_id";
    /** The text content field. */
    public static final String TEXT = "text";
    /** The prefix for reading fields. */
    public static final String READING_PREFIX = "reading_";
    /** The score field. */
    public static final String SCORE = "score";