/** The key of the configuration. e.g. 256 */
    String QUERY_HIGHLIGHT_PHRASE_LIMIT = "query.highlight.phrase.limit";

    /** The key of the configuration. e.g. hl_content,digest */
    String QUERY_HIGHLIGHT_CONTENT_DESCRIPTION_FIELDS = "query.highlight.content.description.fields";

    /** The key of the configuration. e.g. true */