private Result doSearch(VespaBackend searcher, Query query, int offset, int hits) {
        query.setOffset(offset);
        query.setHits(hits);
        return searcher.search(SCHEMA, query);
    }
Tests the Fast searcher

@author bratseth
container-search/src/test/java/com/yahoo/prelude/fastsearch/IndexedBackendTestCase.java