.filter(StringUtil::isNotBlank)
                .ifPresent(s -> entry.put(new BasicAttribute(fessConfig.getLdapAttrTelephoneNumber(), s)));
        OptionalUtil.ofNullable(user.getHomePhone())
                .filter(StringUtil::isNotBlank)
                .ifPresent(s -> entry.put(new BasicAttribute(fessConfig.getLdapAttrHomePhone(), s)));

     *
     * @param <T> the type of the entity
     * @param entity the entity (can be null)
     * @return the OptionalEntity
     */
    public static <T> OptionalEntity<T> ofNullable(final T entity) {
        return OptionalEntity.ofNullable(entity, () -> {});
    }

        return OptionalUtil.ofNullable(webConfig);
    }

    /**
     * Gets the file crawling configuration generated from the parsed GSA config.
     *
     * @return an optional containing the file configuration, or empty if no file URLs were found
     */
    public OptionalEntity<FileConfig> getFileConfig() {
        return OptionalUtil.ofNullable(fileConfig);
    }

    /**

        }
        final long execTime = systemHelper.getCurrentTimeAsLong() - startTime;

        return searchResult.build(requestBuilder, execTime, OptionalEntity.ofNullable(response, () -> {}));
    }

    /**
     * Performs a search with custom conditions and result processing.
     *
     * @param <T>          the result type
     * @param index        the index name