// Ensure bucket exists on first access
            client.ensureBucketExists();

            final List<StorageItem> items = client.listObjects(prefix, fessConfig.getStorageMaxItemsInPageAsInteger());

            for (final StorageItem item : items) {
                final Map<String, Object> map = new HashMap<>();
                map.put("id", item.getEncodedId());

     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     * @throws NumberFormatException When the property is not integer.
     */
    Integer getStorageMaxItemsInPageAsInteger();

    /**
     * Get the value for the key 'password.invalid.admin.passwords'. <br>
     * The value is, e.g. admin <br>
     * comment: List of invalid admin passwords.