private FastHit createHitWithoutFields(String uri, int relevancy) {
        return new FastHit(uri,relevancy);
    }
Simulates the return when grouping is used for aggregation purposes and there is a plain hit list in addition:
The returned result contains both regular hits at the top level (from non-grouping)
and groups contained aggregation information.
container-search/src/test/java/com/yahoo/prelude/searcher/test/FieldCollapsingSearcherTestCase.java