* comment: Content type field for GSA index queries.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getQueryGsaIndexFieldContentType();

    /**
     * Get the value for the key 'query.collapse.max.concurrent.group.results'. <br>
     * The value is, e.g. 4 <br>
     * comment: Maximum concurrent group results for collapse queries.