// Tests for buildFunctionScoreQuery method
    // ============================================================

    @Test
    public void test_buildFunctionScoreQuery_singleWordQuery() {
        QueryBuilder innerQuery = request.buildQuery("test", Collections.emptyList());
        QueryBuilder result = request.buildFunctionScoreQuery("test", innerQuery);

        assertNotNull(result);

     * @return The QueryBuilder instance.
     * @deprecated Use {@link SuggestQueryBuilder#buildFunctionScoreQuery(String, QueryBuilder)} instead.
     */
    @Deprecated
    protected QueryBuilder buildFunctionScoreQuery(final String q, final QueryBuilder queryBuilder) {
        return createOverridableQueryBuilder().buildFunctionScoreQuery(q, queryBuilder);
    }

    /**

    /**
     * Builds a function score query.
     * @param query The query string.
     * @param queryBuilder The query builder.
     * @return The QueryBuilder instance.
     */
    public QueryBuilder buildFunctionScoreQuery(final String query, final QueryBuilder queryBuilder) {

        final List<FunctionScoreQueryBuilder.FilterFunctionBuilder> flist = new ArrayList<>();