.fuzziness(Fuzziness.build(fessConfig.getQueryBoostFuzzyContentFuzziness()))
                    .maxExpansions(fessConfig.getQueryBoostFuzzyContentExpansionsAsInteger()));
        }
        return defaultQuery;
    }

    /**
     * Converts a site field query to a prefix query for site filtering.
     *
     * @param fessConfig the Fess configuration

     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     * @throws NumberFormatException When the property is not integer.
     */
    Integer getQueryBoostFuzzyContentExpansionsAsInteger();

    /**
     * Get the value for the key 'query.boost.fuzzy.content.prefix_length'. <br>
     * The value is, e.g. 0 <br>
     * comment: Prefix length for fuzzy content queries.