@Override
        public Result search(Query query, Execution execution) {
            Result result = execution.search(query);
            query.properties().set("rate.cost", query.properties().get("cost"));
            return result;
        }
The purpose of this test is simply to verify that cost is picked up after executing the query
container-search/src/test/java/com/yahoo/search/searchers/test/RateLimitingSearcherTestCase.java