sessionManager.errors().saveMessages(messages);
    }

    /**
     * Copies properties from source bean to destination bean.
     * This is a utility method that wraps BeanUtil.copyBeanToBean with custom options.
     *
     * @param src the source bean object
     * @param dest the destination bean object
     * @param option a consumer function to configure copy options
     */

        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());

    }

    /**
     * @throws Exception
     */
    @Test
    public void testCopyBeanToBean_converter() throws Exception {
        final Bean bean = new Bean();
        bean.aaa = "1,000";
        final Bean2 bean2 = new Bean2();
        BeanUtil.copyBeanToBean(bean, bean2, converter(new NumberConverter("#,##0")));
        assertThat(bean2.aaa, is(Integer.valueOf(1000)));
    }

    /**
     * @throws Exception

    /**
     * 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

        }
    }

    /**
     * Copies the source Bean to a new instance of the destination Bean and returns it.
     *
     * @param <T> The type of the destination Bean.
     * @param src The source Bean. Must not be {@literal null}.
     * @param destClass The type of the destination Bean. Must not be {@literal null}.
     * @return The newly copied Bean.
     */

        });

    }

    /**
     * Sets up the search conditions for group list queries based on pager criteria.
     * Configures the condition bean with ID filtering and ordering by name.
     *
     * @param cb the condition bean for building the query
     * @param groupPager the pager containing search and filter criteria
     */

    //                                                                        ============
    protected JsonResponse<ApiResult> asJson(final ApiResult bean) {
        return new JsonResponse<>(bean);
    }

    protected ApiResult createFailureBean(final Status status, final String message) {
        return new ApiErrorResponse().message(message).status(status).result();
    }

 *     }
 * }
 * </pre>
 *
 * @author higa
 * @see BeanDescFactory
 */
public interface BeanDesc {

    /**
     * Returns the class of the Bean.
     *
     * @param <T>
     *            The class of the Bean
     * @return The class of the Bean
     */
    <T> Class<T> getBeanClass();

    /**
     * Returns a map from type variables to type arguments.
     *

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());