*/
    protected int getMaxSymbolTermSize() {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        return fessConfig.getCrawlerDocumentMaxSymbolTermSizeAsInteger();
    }

    /**
     * Checks if duplicate term removal is enabled in configuration.
     *
     * @return true if duplicate terms should be removed, false otherwise
     */

labels.related_content_content=Content
labels.related_content_list_term=Term
labels.related_content_term=Term
labels.related_content_title_details=Related Content
labels.related_query_configuration=Related Query
labels.related_query_list_term=Term
labels.related_query_queries=Queries
labels.related_query_term=Term
labels.related_query_title_details=Related Query
labels.crud_button_create=Create

                                Map.of("term", Map.of("type", TYPE_EVENT)), //
                                Map.of("range", Map.of("createdTime", Map.of("gt", lastEventCheckTime)))), //
                        "should", List.of( //
                                Map.of("term", Map.of("targetInstanceId", TARGET_ALL)), //
                                Map.of("term", Map.of("targetInstanceId", instanceId))), //

labels.related_content_content=Content
labels.related_content_list_term=Term
labels.related_content_term=Term
labels.related_content_title_details=Related Content
labels.related_query_configuration=Related Query
labels.related_query_list_term=Term
labels.related_query_queries=Queries
labels.related_query_term=Term
labels.related_query_title_details=Related Query
labels.crud_button_create=Create

     */
    @Override
    public TermVectorsRequestBuilder prepareTermVectors(final String index, final String id) {
        return client.prepareTermVectors(index, id);
    }

    /**
     * Gets term vectors for multiple documents asynchronously.
     *
     * @param request the multi-term vectors request
     * @return a future for the multi-term vectors response
     */
    @Override

    @Test
    public void test_toJson_nestedMap() {
        final Map<String, Object> map = Map.of("query", Map.of("term", Map.of("type", "heartbeat")));
        final String json = coordinatorHelper.toJson(map);
        assertNotNull(json);
        assertTrue(json.contains("\"query\""));
        assertTrue(json.contains("\"term\""));
        assertTrue(json.contains("\"type\":\"heartbeat\""));
    }

    @Test

    /** The key of the message: Label */
    public static final String LABELS_TARGET_LABEL = "{labels.targetLabel}";

    /** The key of the message: Term */
    public static final String LABELS_TERM = "{labels.term}";

    /** The key of the message: Fields */
    public static final String LABELS_FIELDS = "{labels.fields}";

    /** The key of the message: Extended Query */

# Whether to append filename to documents.
crawler.document.append.filename=false
# Maximum size of alphanumeric terms in documents.
crawler.document.max.alphanum.term.size=20
# Maximum size of symbol terms in documents.
crawler.document.max.symbol.term.size=10
# Whether to remove duplicate terms in documents.
crawler.document.duplicate.term.removed=false
# Unicode space characters for document parsing.

Production  = production_name "=" [ Expression ] "." .
Expression  = Term { "|" Term } .
Term        = Factor { Factor } .
Factor      = production_name | token [ "…" token ] | Group | Option | Repetition .
Group       = "(" Expression ")" .
Option      = "[" Expression "]" .
Repetition  = "{" Expression "}" .
</pre>

<p>
Productions are expressions constructed from terms and the following
operators, in increasing precedence:
</p>

    String CRAWLER_DOCUMENT_MAX_ALPHANUM_TERM_SIZE = "crawler.document.max.alphanum.term.size";

    /** The key of the configuration. e.g. 10 */
    String CRAWLER_DOCUMENT_MAX_SYMBOL_TERM_SIZE = "crawler.document.max.symbol.term.size";

    /** The key of the configuration. e.g. false */
    String CRAWLER_DOCUMENT_DUPLICATE_TERM_REMOVED = "crawler.document.duplicate.term.removed";