* Get the value for the key 'query.boost.title' as {@link java.math.BigDecimal}. <br>
     * The value is, e.g. 0.5 <br>
     * comment: Boost value for title field in queries.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     * @throws NumberFormatException When the property is not decimal.
     */
    java.math.BigDecimal getQueryBoostTitleAsDecimal();

    /**