* <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.
     */

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)

        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++) {

    /**
     * Constructor for AnalyzerSettings.
     * @param client The OpenSearch client.
     * @param settings The SuggestSettings instance.
     * @param settingsIndexName The name of the settings index.
     */
    public AnalyzerSettings(final Client client, final SuggestSettings settings, final String settingsIndexName) {
        this.client = client;
        this.settings = settings;

import org.codelibs.fess.suggest.index.contents.querylog.QueryLogReader;
import org.codelibs.fess.suggest.normalizer.Normalizer;
import org.codelibs.fess.suggest.settings.SuggestSettings;
import org.opensearch.OpenSearchStatusException;
import org.opensearch.transport.client.Client;

/**
 * Internal operations class for content-based indexing functionality.

import org.opensearch.action.admin.indices.analyze.AnalyzeAction.AnalyzeToken;
import org.opensearch.index.IndexNotFoundException;

public class AnalyzerSettingsTest {
    String id = "analyzerSettingsTest";

    static SuggestSettings settings;

    static OpenSearchRunner runner;

    @BeforeClass
    public static void beforeClass() throws Exception {
        runner = new OpenSearchRunner();