* Uses O(1) Set lookup for improved performance.
     * @param field The field name to check.
     * @return True if the field is a search field, false otherwise.
     */
    protected boolean isSearchField(final String field) {
        final QueryFieldConfig config = getQueryFieldConfig();
        return config.searchFieldSet != null && config.searchFieldSet.contains(field);
    }

    /**

            return convertWildcardQuery(fessConfig, context, termQuery, boost, field, text);
        }
        if (!isSearchField(field)) {
            final String origQuery = termQuery.toString();
            return convertDefaultTermQuery(fessConfig, context, termQuery, boost, DEFAULT_FIELD, origQuery);
        }