private void assertHitWithoutFields(String uri,int relevancy,Hit hit) {
        assertEquals(uri,hit.getId().toString());
        assertEquals(relevancy, ((int) hit.getRelevance().getScore()));
        assertTrue(hit.fields().isEmpty());
    }
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