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() {

    @Override
    public void error(final String message, final Throwable t) {
        logger.error(message, t);
    }

    @Override
    public boolean isWarnEnabled() {
        return logger.isWarnEnabled();
    }

    @Override
    public void warn(final String message) {
        logger.warn(message);
    }

    @Override
    public void warn(final String message, final Throwable t) {

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

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

import java.util.function.Supplier;

import org.codelibs.fess.crawler.client.CrawlerClientFactory;

public class CrawlingConfigWrapper implements CrawlingConfig {

    private final CrawlingConfig crawlingConfig;

    public CrawlingConfigWrapper(final CrawlingConfig crawlingConfig) {
        this.crawlingConfig = crawlingConfig;
    }

    @Override
    public String getId() {
        return crawlingConfig.getId();
    }

    private static final long serialVersionUID = 1L;

    /** The key of the message:  */
    public static final String ERRORS_front_header = "{errors.front_header}";

    /** The key of the message:  */
    public static final String ERRORS_front_footer = "{errors.front_footer}";

    /** The key of the message: <div class="alert alert-warning"> */

            assertNull(responseData.getResponseBody());
        }

        try (final ResponseData responseData = smbClient.doHead(baseUrl)) {
            assertNull(responseData);
        }
        try (final ResponseData responseData = smbClient.doHead(baseUrl + "dir1/")) {
            assertNull(responseData);
        }
        try (final ResponseData responseData = smbClient.doHead(baseUrl + "dir1/dir2/")) {

     */
    public AnalyzerConverter(final Client client, final SuggestSettings settings) {
        this.client = client;
        this.settings = settings;
        analyzerSettings = settings.analyzer();
    }

    @Override
    public void init() throws IOException {
        // nothing
    }

    @Override
    public List<String> convert(final String text, final String field, final String... langs) throws IOException {

     */
    @Override
    public InetAddress[] resolve(final String host) throws UnknownHostException {
        // Handle IPv6 addresses in bracket notation
        if (host != null && host.length() > 2 && host.startsWith("[") && host.endsWith("]")) {
            // Remove brackets for IPv6 address resolution
            final String ipv6Address = host.substring(1, host.length() - 1);

  static final long EXPONENT_MASK = 0x7ff0000000000000L;

  // The mask for the sign, according to the {@link
  // Double#doubleToRawLongBits(double)} spec.
  static final long SIGN_MASK = 0x8000000000000000L;

  static final int SIGNIFICAND_BITS = 52;

  static final int EXPONENT_BIAS = 1023;

  /** The implicit 1 bit that is omitted in significands of normal doubles. */

     */
    protected boolean bucketExists(final String name) {
        try {
            final HeadBucketRequest request = HeadBucketRequest.builder().bucket(name).build();
            awsS3Client.headBucket(request);
            return true;
        } catch (final NoSuchBucketException e) {
            return false;
        } catch (final Exception e) {