request.setSkipDuplicateWords(skipDuplicateWords);
        return this;
    }

    /**
     * Adds a language to filter by.
     * @param lang The language.
     * @return This builder instance.
     */
    public SuggestRequestBuilder addLang(final String lang) {
        request.addLang(lang);
        return this;
    }

- **Version Compatibility:**
With Java serialization, even minor changes to a class (like adding a field) can break compatibility.

- **Cross-Language Compatibility:**
Java serialization is inherently Java-centric and does not support cross-language scenarios well.

- **Type Safety:**
Java serialization does not enforce type safety as strictly as some alternatives, potentially leading to runtime errors.

## Decision

 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.thumbnail;

import java.util.HashMap;
import java.util.Map;

import org.lastaflute.web.validation.Required;

     */
    public void addField(final String field) {
        fields.add(field);
    }

    /**
     * Adds a language to filter by.
     * @param lang The language.
     */
    public void addLanguage(final String lang) {
        languages.add(lang);
    }

    /**
     * Sets the detail flag.
     * @param detail The detail flag.
     */

 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.api.spi;

import org.apache.maven.api.Type;
import org.apache.maven.api.annotations.Consumer;

 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.cache;

import java.util.HashMap;
import java.util.Map;

import org.lastaflute.web.validation.Required;

 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.reflect.subpackage;

 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.core.misc;

import java.util.Locale;
import java.util.function.Supplier;

/**
 * Utility class for {@link Locale}.
 *

 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.error;

import java.util.HashMap;
import java.util.Map;

/**

    /**
     * Loads the known keywords. Although the JSON on disk maps from language to keywords, this method
     * inverts this to map from keyword to languages. This is because the same keywords are found in
     * multiple languages, so it is easier and more useful to have a single map of keywords.
     *
     * @return a mapping from keyword to languages.
     */
    private Map<String, Set<String>> loadKeywords() {