dispatcher.registerHandler(MailService.FOLDER_ACTION_REQUEST, new OfflineFolderAction());
    public void registerHandlers(DocumentDispatcher dispatcher) {        // sync        dispatcher.registerHandler(SYNC_REQUEST, new OfflineSync());        // fetching external data        dispatcher.registerHandler(MailService.IMPORT_DATA_REQUEST, new OfflineImportData());        dispatcher.registerHandler(MailService.FOLDER_ACTION_REQUEST, new OfflineFolderAction());    }