/**
     * Message manager for handling internationalized messages and validation errors.
     * Used to convert validation messages to localized text for API responses.
     */
    @Resource
    protected MessageManager messageManager;

    /**
     * Service for managing API access tokens including validation and authentication.
     * Used to verify token-based authentication for API requests.
     */
    @Resource

    //                                                                       =============
    protected String resolveLabelIfNeeds(final MessageManager messageManager, final Locale locale, final String label) {
        return label.startsWith("labels.") ? messageManager.getMessage(locale, label) : label;
    }

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

    @Resource
    protected ViewHelper viewHelper;

    /** Manager for handling application messages and internationalization. */
    @Resource
    private MessageManager messageManager;

    /** Manager for handling HTTP request operations. */
    @Resource
    private RequestManager requestManager;

    private static final String DICTIONARY_MANAGER = "dictionaryManager";

    private static final String DATA_SERVICE = "dataService";

    private static final String MESSAGE_MANAGER = "messageManager";

    private static final String INDEX_UPDATER = "indexUpdater";

    private static final String FILE_TYPE_HELPER = "fileTypeHelper";