TestBean bean = new TestBean();

        // Test null value (should be valid)
        bean.setCronExpression(null);
        Set<ConstraintViolation<TestBean>> violations = validator.validate(bean);
        assertTrue(violations.isEmpty());

        // Test empty string (should be valid)
        bean.setCronExpression("");
        violations = validator.validate(bean);
        assertTrue(violations.isEmpty());

    /**
     * Performs a search operation using the specified query and parameters.
     *
     * @param query the search query string
     * @param params the search request parameters
     * @param userBean the optional user bean for access control
     * @return the search result containing documents and metadata
     */
    @Override

nameProperty.setValue(bean, "John Doe");

// Bean copying with flexible options
BeanUtil.copyBeanToBean(source, destination);
BeanUtil.copyBeanToBean(source, destination, options -> 
    options.exclude("password", "internalId"));

// Convert between beans and maps
Map<String, Object> map = BeanUtil.copyBeanToNewMap(bean);
MyBean newBean = BeanUtil.copyMapToNewBean(map, MyBean.class);
```

### Type Conversion

        FessUserBean anotherBean = new FessUserBean(anotherUser);
        assertSame(anotherUser, anotherBean.getFessUser());
    }

    public void test_empty() {
        // Test empty user bean creation
        FessUserBean emptyBean = FessUserBean.empty();
        assertNotNull(emptyBean);

        // Test getUserId returns EMPTY_USER_ID
        assertEquals(Constants.EMPTY_USER_ID, emptyBean.getUserId());

   * multisets ("constant multisets"). Example:
   *
   * {@snippet :
   * public static final ImmutableMultiset<Bean> BEANS =
   *     new ImmutableMultiset.Builder<Bean>()
   *         .addCopies(Bean.COCOA, 4)
   *         .addCopies(Bean.GARDEN, 6)
   *         .addCopies(Bean.RED, 8)
   *         .addCopies(Bean.BLACK_EYED, 10)
   *         .build();
   * }
   *

        }).orElse(null);
    }

    /**
     * Extracts the user code from the user bean stored in the session.
     * This method retrieves the authenticated user information and creates an encrypted user code.
     *
     * @param request the HTTP servlet request
     * @return the user code from the user bean, or null if not found or invalid
     */

     * o saveInfo() <span style="color: #3F7E5E">// save messages to session</span>
     * o write() <span style="color: #3F7E5E">// write text to specified file</span>
     * o copyBeanToBean() <span style="color: #3F7E5E">// copy bean to bean by BeanUtil</span>
     * o getServletContext() <span style="color: #3F7E5E">// get servlet context</span>
     * </pre>
     */
    @Override
    public void document1_CallableSuperMethod() {

import org.codelibs.core.lang.StringUtil;
import org.codelibs.fess.Constants;
import org.codelibs.fess.entity.FessUser;
import org.lastaflute.web.login.TypicalUserBean;

/**
 * The user bean for Fess.
 *
 * @author jflute
 */
public class FessUserBean extends TypicalUserBean<String> { // #change_it also LoginAssist

    // ===================================================================================

        assertEquals(params, testSearcher.lastParams);
        assertEquals(userBean, testSearcher.lastUserBean);
    }

    public void test_search_withUserBean() {
        // Test search with user bean present
        TestRankFusionSearcher testSearcher = new TestRankFusionSearcher();
        String query = "user query";
        SearchRequestParams params = createTestSearchRequestParams();

    }

    /**
     * Initializes the rank fusion processor after construction.
     * Sets up the window size based on configuration and loads available searchers.
     * This method is called automatically after the bean is constructed.
     */
    @PostConstruct
    public void init() {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final int maxPageSize = fessConfig.getPagingSearchPageMaxSizeAsInteger();