* <pre>
 * {@code
 * Client client = ...;
 * Map<String, Object> initialSettings = ...;
 * SuggestSettings.TimeoutSettings timeoutSettings = new SuggestSettings.TimeoutSettings();
 * SuggestSettings suggestSettings = new SuggestSettings(client, "settingsId", initialSettings, "settingsIndexName", timeoutSettings);
 * suggestSettings.init();
 * }
 * </pre>
 *
 * <p>Key methods:</p>
 * <ul>

 * <ul>
 * <li>{@link #scrollSearch(Client, SuggestSettings, String, QueryBuilder, int, HitProcessor)} - Collects results into a list</li>
 * <li>{@link #scrollSearchWithCallback(Client, SuggestSettings, String, QueryBuilder, int, Consumer)} - Processes each hit individually</li>
 * <li>{@link #scrollSearchWithBatchCallback(Client, SuggestSettings, String, QueryBuilder, int, BiConsumer)} - Processes hits in batches</li>
 * </ul>

    public static SuggesterBuilder builder() {
        return new SuggesterBuilder();
    }

    // getter
    /**
     * Returns the SuggestSettings instance.
     * @return The SuggestSettings instance.
     */
    public SuggestSettings settings() {
        return suggestSettings;
    }

    /**
     * Returns the ReadingConverter instance.
     * @return The ReadingConverter instance.
     */

        return this;
    }

    /**
     * Builds a SuggestSettings instance.
     * @param client The OpenSearch client.
     * @param id The ID.
     * @return A SuggestSettings instance.
     */
    public SuggestSettings build(final Client client, final String id) {
        return new SuggestSettings(client, id, initialSettings, settingsIndexName, timeoutSettings);
    }

Location: `src/main/java/org/codelibs/fess/suggest/index/SuggestIndexer.java`

Handles all indexing operations, content parsing, and word management (bad words, elevate words).

### SuggestSettings (Configuration)
Location: `src/main/java/org/codelibs/fess/suggest/settings/SuggestSettings.java`

Manages configuration stored in OpenSearch: analyzers, bad words, elevate words, timeouts.

### SuggestItem (Domain Entity)

    private final Client client;
    private final SuggestSettings settings;
    private final SuggestWriter suggestWriter;

    /**
     * Constructor.
     *
     * @param client The OpenSearch client
     * @param settings The suggest settings
     * @param suggestWriter The suggest writer for performing writes
     */
    public IndexingOperations(final Client client, final SuggestSettings settings, final SuggestWriter suggestWriter) {

        assertEquals(0, response2.getNum());
    }

    @Test
    public void test_indexFromQueryString() throws Exception {
        SuggestSettings settings = suggester.settings();
        String field = settings.array().get(SuggestSettings.DefaultKeys.SUPPORTED_FIELDS)[0];

        SuggestIndexResponse indexResponse = suggester.indexer().indexFromQueryLog(new QueryLog(field + ":検索", null));

    @Test
    @SuppressWarnings("unchecked")
    public void test_indexFromDocumentWithMissingField() throws Exception {
        SuggestSettings settings = suggester.settings();
        String field = settings.array().get(SuggestSettings.DefaultKeys.SUPPORTED_FIELDS)[0];

        Map<String, Object>[] documents = new Map[1];
        documents[0] = new HashMap<>();

import org.codelibs.fess.suggest.index.SuggestDeleteResponse;
import org.codelibs.fess.suggest.index.SuggestIndexResponse;
import org.codelibs.fess.suggest.normalizer.Normalizer;
import org.codelibs.fess.suggest.settings.SuggestSettings;
import org.codelibs.fess.suggest.util.SuggestUtil;
import org.opensearch.index.query.QueryBuilders;

/**
 * Internal operations class for bad word and elevate word management.

    }

    @Test
    public void test_indexFromQueryLogWithParallel() throws Exception {
        SuggestSettings settings = suggester.settings();
        settings.set(SuggestSettings.DefaultKeys.PARALLEL_PROCESSING, "true");
        String field = settings.array().get(SuggestSettings.DefaultKeys.SUPPORTED_FIELDS)[0];

        QueryLog[] queryLogs = new QueryLog[10];
        for (int i = 0; i < 10; i++) {