//                                                                           Attribute
    //                                                                           =========

    // ===================================================================================
    // Attribute
    // =========
    /** The search helper for performing search operations. */
    @Resource

    private static final String INVALID_OLD_PASSWORD = "LoginAction.invalidOldPassword";

    // ===================================================================================
    // Attribute
    //
    @Resource
    private UserService userService;

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

        super();
    }

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========
    /** Service for managing job log data */
    @Resource
    private JobLogService jobLogService;

    //

    // ===================================================================================
    //                                                                           Attribute
    //

    // ===================================================================================
    //                                                                               Hook

 *
 */
public class UserInfoHelper {

    /**
     * Default constructor for UserInfoHelper.
     */
    public UserInfoHelper() {
        // Default constructor
    }

    /** The session attribute key for storing user bean information */
    protected static final String USER_BEAN = "lastaflute.action.USER_BEAN.FessUserBean";

    /** The maximum size of the result document IDs cache */

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========
    @Resource
    private UserService userService;
    @Resource
    private RoleService roleService;
    @Resource

        assertEquals(0x8000, SmbConstants.CAP_LARGE_WRITEX);
        assertEquals(0x80000000, SmbConstants.CAP_EXTENDED_SECURITY);
    }

    @Test
    @DisplayName("Should define file attribute constants")
    void testFileAttributes() {
        assertEquals(0x01, SmbConstants.ATTR_READONLY);
        assertEquals(0x02, SmbConstants.ATTR_HIDDEN);
        assertEquals(0x04, SmbConstants.ATTR_SYSTEM);

        super();
    }

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========

    /** The user service for managing user settings. */
    @Resource
    private UserService userService;

    /**

    protected PathMappingHelper pathMappingHelper;

    // ===================================================================================
    //                                                                           Attribute
    //

    // ===================================================================================
    //                                                                               Hook

Now use the parameter `callbacks` in *your API's path operation decorator* to pass the attribute `.routes` (that's actually just a `list` of routes/*path operations*) from that callback router:

{* ../../docs_src/openapi_callbacks/tutorial001.py hl[35] *}

/// tip

Notice that you are not passing the router itself (`invoices_callback_router`) to `callback=`, but the attribute `.routes`, as in `invoices_callback_router.routes`.

///