final Map<String, MappingMetadata> indexMappings = getMappingsResponse.mappings();
        if (indexMappings == null || !indexMappings.containsKey("properties")) {
            String source = null;
            final String mappingFile = getResourcePath(indexConfigPath, fessConfig.getFesenType(), "/" + index + "/" + docType + ".json");
            try {

    String CRAWLER_METADATA_CONTENT_EXCLUDES = "crawlerMetadataContentExcludes";

    Map<String, Object> propMap = new ConcurrentHashMap<>();

    //
    // system.properties
    //

    default void storeSystemProperties() {
        ComponentUtil.getSystemProperties().store();
    }

    default String getSystemProperty(final String key) {