return null;
            }
        };

        final Normalizer normalizer = (text, field, lang) -> null;

        final Suggester suggester = Suggester.builder()
                .settings(SuggestSettings.builder().setSettingsIndexName(settingsIndexName))
                .readingConverter(converter)
                .normalizer(normalizer)
                .build(runner.client(), id);

        String result = chain.normalize("ａｂｃ", "field", "en", "ja");

        assertEquals("abc", result);
    }

    @Test
    public void test_addMultipleNormalizersInOrder() throws Exception {
        NormalizerChain chain = new NormalizerChain();
        Normalizer normalizer1 = (text, field, langs) -> text + "-1";
        Normalizer normalizer2 = (text, field, langs) -> text + "-2";

     * @param readingConverter The reading converter.
     * @param normalizer The normalizer.
     */
    public SuggestRequestBuilder(final Client client, final ReadingConverter readingConverter, final Normalizer normalizer) {
        super(client, new SuggestRequest());
        request.setReadingConverter(readingConverter);
        request.setNormalizer(normalizer);
    }

    /**
     * Sets the index for the request.

    }

    /**
     * Creates a default normalizer using the provided client and suggest settings.
     * The normalizer chain includes an AnalyzerNormalizer.
     *
     * @param client the client to be used for creating the normalizer
     * @param settings the suggest settings to be used for creating the normalizer
     * @return a NormalizerChain with the default normalizers
     */

        runner.close();
        runner.clean();
    }

    @Test
    public void test_normalize() throws Exception {
        Normalizer normalizer = SuggestUtil.createDefaultNormalizer(runner.client(), suggester.settings());
        assertEquals("12345,.*[]「」abcケンサクabcdけんさくガギグゲゴ", normalizer.normalize("１２３４５,.*[]「」ＡBCｹﾝｻｸabcdけんさくｶﾞｷﾞｸﾞｹﾞｺﾞ", null));
    }

    }

    protected ModelInterpolator newModelInterpolator() {
        UrlNormalizer normalizer = newUrlNormalizer();
        PathTranslator pathTranslator = newPathTranslator();
        return new StringVisitorModelInterpolator()
                .setPathTranslator(pathTranslator)
                .setUrlNormalizer(normalizer)
                .setVersionPropertiesProcessor(newModelVersionPropertiesProcessor());
    }

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.suggest.normalizer;

/**
 * Normalizes full-width alphanumeric characters to half-width alphanumeric characters.
 */
public class FullWidthToHalfWidthAlphabetNormalizer implements Normalizer {
    /**
     * Constructs a new {@link FullWidthToHalfWidthAlphabetNormalizer}.
     */

});
```

### Custom Text Processing

```java
import org.codelibs.fess.suggest.settings.SuggestSettings;
import org.codelibs.fess.suggest.converter.ReadingConverterChain;
import org.codelibs.fess.suggest.normalizer.ICUNormalizer;

// Configure custom settings
SuggestSettings settings = SuggestSettings.builder()
    .analyzer(analyzers -> {
        // Configure custom analyzers

│   └── popularwords/          # Popular word queries
├── settings/                   # Configuration management
├── entity/                     # Domain models (SuggestItem, etc.)
├── normalizer/                 # Text normalizers
├── converter/                  # Reading converters (katakana, romaji)
├── concurrent/                 # Async patterns (Deferred/Promise)
└── util/                      # Utilities
```

@Deprecated
class DefaultUrlNormalizerTest {

    private UrlNormalizer normalizer = new DefaultUrlNormalizer();

    private String normalize(String url) {
        return normalizer.normalize(url);
    }

    @Test
    void testNullSafe() {
        assertNull(normalize(null));
    }

    @Test
    void testTrailingSlash() {
        assertEquals("", normalize(""));