@Test
    public void testConcatKinds() {
        // Test static concatKinds method
        SuggestItem.Kind[] kinds1 = { SuggestItem.Kind.QUERY };
        SuggestItem.Kind[] kinds2 = { SuggestItem.Kind.DOCUMENT, SuggestItem.Kind.QUERY };

        SuggestItem.Kind[] result = SuggestItem.concatKinds(kinds1, kinds2);

        assertNotNull(result);
        assertEquals(2, result.length); // Should not have duplicates

    private int queryFreqThreshold = 10;

    private final List<String> excludeWords = new ArrayList<>();

    /**
     * Sets the index name.
     * @param index The index name.
     */
    public void setIndex(final String index) {
        this.index = index;
    }

    /**
     * Sets the size of results.
     * @param size The size.
     */
    public void setSize(final int size) {

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.opensearch.extension.kuromoji.index.analysis;

import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.ja.JapaneseNumberFilter;
import org.opensearch.common.settings.Settings;
import org.opensearch.env.Environment;
import org.opensearch.index.IndexSettings;

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.opensearch.extension.kuromoji.index.analysis;

import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.ja.JapaneseReadingFormFilter;
import org.opensearch.common.settings.Settings;
import org.opensearch.env.Environment;

import org.opensearch.common.settings.Settings;
import org.opensearch.env.Environment;
import org.opensearch.index.IndexSettings;
import org.opensearch.index.analysis.AbstractTokenFilterFactory;
import org.opensearch.index.analysis.Analysis;

public class KuromojiPartOfSpeechFilterFactory extends AbstractTokenFilterFactory {

    private final Set<String> stopTags = new HashSet<>();

    /** Constant for UrlSet type. */
    public static final String URLSET = "UrlSet";

    /** Constant for Index type. */
    public static final String INDEX = "Index";

    /** The list of sitemaps in this set. */
    private final List<Sitemap> sitemapList = new ArrayList<>();

    /** The type of this sitemap set (URLSET or INDEX). */
    private String type = URLSET;

    /**

import org.apache.lucene.search.suggest.analyzing.SuggestStopFilter;
import org.opensearch.common.settings.Settings;
import org.opensearch.env.Environment;
import org.opensearch.index.IndexSettings;
import org.opensearch.index.analysis.AbstractTokenFilterFactory;
import org.opensearch.index.analysis.Analysis;

public class JapaneseStopTokenFilterFactory extends AbstractTokenFilterFactory {

import org.opensearch.index.IndexSettings;
import org.opensearch.index.analysis.AbstractTokenFilterFactory;
import org.opensearch.index.analysis.Analysis;

public class StopTokenPrefixFilterFactory extends AbstractTokenFilterFactory {

    private final String[] stopwords;

    private final boolean ignoreCase;

    public StopTokenPrefixFilterFactory(final IndexSettings indexSettings, final Environment environment, final String name,

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.opensearch.extension.analysis;

import org.apache.lucene.analysis.TokenStream;
import org.codelibs.analysis.ja.CharTypeFilter;
import org.opensearch.common.settings.Settings;
import org.opensearch.env.Environment;
import org.opensearch.index.IndexSettings;

import org.opensearch.action.bulk.BulkResponse;
import org.opensearch.action.get.GetResponse;
import org.opensearch.action.index.IndexAction;
import org.opensearch.action.index.IndexRequest;
import org.opensearch.action.index.IndexRequestBuilder;
import org.opensearch.common.unit.TimeValue;
import org.opensearch.index.query.QueryBuilder;
import org.opensearch.transport.client.Client;

/**