if (logger.isDebugEnabled()) {
                logger.debug("Failed to create suggest index: index={}", index, e);
            }
            throw new SuggesterException("Failed to create suggest index: " + index, e);
        }
    }

    /**
     * Creates a new index and replaces the current update alias with the new index.
     */
    public void createNextIndex() {
        try {

        @Override
        public E get(final int index) {
            return parent.get(index);
        }

        @Override
        public E set(final int index, final E element) {
            return parent.set(index, element);
        }

        @Override
        public void add(final int index, final E element) {
            parent.add(index, element);
        }

        @Override

                int index = auth.indexOf(':');
                String user = index != -1 ? auth.substring(0, index) : auth;
                final String password = index != -1 ? auth.substring(index + 1) : "";
                index = user.indexOf('\\');
                if (index == -1) {
                    index = user.indexOf('/');
                }

        @DisplayName("Returns 0 regardless of dst and index")
        void returnsZero_forVariousIndexes(int index) {
            // Arrange
            Smb2LogoffResponse resp = newResponse();
            byte[] buffer = new byte[8];
            byte[] original = buffer.clone();

            // Act
            int written = resp.writeBytesWireFormat(buffer, index);

            // Assert

        return getEntryAt(index).getKey();
    }

    /**
     * Returns the {@link java.util.Map.Entry} at the specified index.
     *
     * @param index
     *            the index
     * @return the {@link java.util.Map.Entry} at the specified index
     */
    public Map.Entry<K, V> getEntryAt(final int index) {
        assertIndex(index < size, "Index:" + index + ", Size:" + size);

                new String[] { SuggestConstants.DEFAULT_ROLE }, new String[] { "en" }, SuggestItem.Kind.QUERY);

        suggester.indexer().index(items);
        suggester.refresh();

        PopularWordsResponse response = suggester.popularWords().setSize(10).addLanguage("en").execute().getResponse();

        assertNotNull(response);

    # base package of generated classes
    ; basePackage = org.codelibs.fess.opensearch

    # base path to JSON resource, URL or relative path
    ; basePath = ../src/main/config/es

    # settings for indexes
    ; indexMap = map:{
        # Index: fess_user
        ; fess_user.group = map:{
            ; package = user
            ; esclientDiFile = esclient.xml
            ; esfluteDiFile = esflute_user.xml
        }

                        SearchEngineUtil.scroll(index, hit -> {
                            try {
                                writer.write("{\"index\":{\"_index\":\"" + index + "\",\"_id\":\""
                                        + StringEscapeUtils.escapeJson(hit.getId()) + "\"}}\n");

        }
        return value;
    }

    /**
     * Creates a new index with default settings.
     *
     * @param index     the index configuration name
     * @param indexName the actual index name to create
     * @return true if the index was created successfully, false otherwise
     */
    public boolean createIndex(final String index, final String indexName) {

    }

    /**
     * Deletes documents from the specified index based on the given query.
     *
     * @param client the OpenSearch client to use for executing the query and delete operations
     * @param settings the settings for the suggest feature, including timeouts and scroll settings
     * @param index the name of the index from which documents should be deleted