*   }
 *
 *   public E getEntry() {
 *     return entry;
 *   }
 *
 *   public int compareTo(FIFOEntry<E> other) {
 *     int res = entry.compareTo(other.entry);
 *     if (res == 0 && other.entry != this.entry) {
 *       res = (seqNum < other.seqNum ? -1 : 1);
 *     }
 *     return res;
 *   }
 * }
 * }</pre>
 *
 * @author Doug Lea
 * @author Justin T. Sampson

                final String docIndex = fessConfig.getIndexDocumentUpdateIndex();
                searchEngineClient.admin().indices().prepareClose(docIndex).execute(ActionListener.wrap(res -> {
                    logger.info("Closing index: {}", docIndex);
                    searchEngineClient.admin().indices().prepareOpen(docIndex).execute(ActionListener.wrap(res2 -> {

        if (ComponentUtil.getFessConfig().isLoggingSearchDocsEnabled()) {
            queryResponseList.stream().forEach(res -> {
                final Map<String, Object> map = new HashMap<>();
                Arrays.stream(ComponentUtil.getFessConfig().getLoggingSearchDocsFieldsAsArray()).forEach(s -> map.put(s, res.get(s)));
                searchLog.addDocument(map);
            });
        }
    }

    /**

    protected void deleteScrollContext(final String scrollId) {
        if (scrollId != null) {
            client.prepareClearScroll()
                    .addScrollId(scrollId)
                    .execute(wrap(res -> {}, e -> logger.warn("Failed to clear the scroll context.", e)));
        }
    }

    /**
     * Retrieves a document by ID with custom conditions and result processing.
     *

with the same name as a result parameter is in
<a href="#Declarations_and_scope">scope</a> at the place of the return.
</p>

<pre>
func f(n int) (res int, err error) {
	if _, err := f(n-1); err != nil {
		return  // invalid return statement: err is shadowed
	}
	return
}
</pre>

<h3 id="Break_statements">Break statements</h3>

<p>