*/
    public FtpAuthenticationHolder() {
        // Default constructor
    }

    /**
     * Adds an FtpAuthentication object to the holder.
     * @param auth The FtpAuthentication object to add.
     */
    public void add(final FtpAuthentication auth) {
        if (auth != null) {
            authenticationList.add(auth);
        }
    }

    /**
     * Retrieves an FtpAuthentication object that matches the given path.

     */
    /**
     * Adds a rule to the end of the rule list.
     * @param rule the rule to add
     */
    @Override
    public void addRule(final Rule rule) {
        ruleList.add(rule);
    }

    /**
     * Adds a rule at the specified position in the rule list.
     * @param index the position to insert the rule
     * @param rule the rule to add
     */
    @Override

    }

    /**
     * Adds a tag to filter by.
     * @param tag The tag.
     */
    public void addTag(final String tag) {
        tags.add(tag);
    }

    /**
     * Adds a role to filter by.
     * @param role The role.
     */
    public void addRole(final String role) {
        roles.add(role);
    }

    /**
     * Adds a field to filter by.

 * NormalizerChain chain = new NormalizerChain();
 * chain.add(new SomeNormalizer());
 * chain.add(new AnotherNormalizer());
 * String normalizedText = chain.normalize("input text", "field", "en");
 * </pre>
 *
 * <p>Methods:</p>
 * <ul>
 *   <li>{@link #normalize(String, String, String...)} - Applies all added normalizers to the input text.</li>
 *   <li>{@link #add(Normalizer)} - Adds a new normalizer to the chain.</li>
 * </ul>
 *

    }

    /**
     * Adds a tag to filter by.
     * @param tag The tag.
     */
    public void addTag(final String tag) {
        tags.add(tag);
    }

    /**
     * Adds a role to filter by.
     * @param role The role.
     */
    public void addRole(final String role) {
        roles.add(role);
    }

    /**
     * Adds a field to filter by.

     */
    public void setQuery(final QueryBuilder queryBuilder) {
        this.queryBuilder = queryBuilder;
    }

    /**
     * Adds a sort builder.
     * @param sortBuilder The sort builder.
     */
    public void addSort(final SortBuilder<?> sortBuilder) {
        sortList.add(sortBuilder);
    }

    /**
     * Sets the limit document number percentage.

            return true;
        }

        /**
         * Adds an allowed path to this directive.
         * @param path the path to allow
         */
        public void addAllow(final String path) {
            if (!allowedPaths.contains(path)) {
                allowedPaths.add(path);
            }
        }

        /**
         * Adds a disallowed path to this directive.

            urlQueueMap.put(sessionId, urlQueueList);
        }
        return urlQueueList;
    }

    /**
     * Adds the provided URL queue to the existing queue for the specified session.
     * @param sessionId the session ID
     * @param urlQueueList the URL queue to add
     */
    public synchronized void addUrlQueueList(final String sessionId, final Queue<UrlQueueImpl<Long>> urlQueueList) {

     */
    protected List<Throwable> failures = Collections.synchronizedList(new ArrayList<>());

    /**
     * Adds a Throwable to the list of failures.
     *
     * @param t the Throwable to add
     */
    public void addFailure(final Throwable t) {
        failures.add(t);
    }

    /**
     * Checks if there are any failures recorded.
     *

            esUrlFilter.setFilterType(INCLUDE);
            esUrlFilter.setUrl(url);
            urlFilterList.add(esUrlFilter);
            invalidateSet.add(sessionId);
        }
        insertAll(urlFilterList, OpType.INDEX);
        invalidateSet.forEach(s -> includeFilterCache.invalidate(s));
    }

    /**
     * Adds an exclude URL filter for the specified session.
     *
     * @param sessionId The session ID.