private void displayData(List<Bookmark> bookmarks) {
        if (bookmarks.isEmpty()) {
            logger.info("There is no data");
        } else {
            StringBuilder sb = new StringBuilder();
            sb.append("\r\n\"bookmarks\" : {\r\n");
            for (Bookmark bookmark : bookmarks) {
                sb.append("  {\r\n");
                sb.append("    \"id\" : \"" + bookmark.getId() + "\",\r\n");
                sb.append("    \"url\" : \"" + bookmark.getUrl() + "\",\r\n");
                sb.append("    \"description\" : \"" + bookmark.getDescription() + "\",\r\n");
                sb.append("    \"creationDate\" : \"" + bookmark.getCreationDate() + "\",\r\n");
                sb.append("    \"modificationDate\" : \"" + bookmark.getModificationDate() + "\"\r\n");
                sb.append("  }\r\n");
            }
            sb.append("}");
            logger.info(sb.toString());
        }
    }