}

    protected Map<String, List<Tuple3<String, QueryBuilder, ScoreFunctionBuilder<?>>>> getQueryMap(final String key) {
        final Map<String, List<Tuple3<String, QueryBuilder, ScoreFunctionBuilder<?>>>> map = keyMatchQueryMap.get(key);
        if (map != null) {
            return map;
        }
        return Collections.emptyMap();
    }