@Override
    public Result search(Query query, Execution execution) {
        Result result;
        result = execution.search(query);
        execution.fill(result);
        return result;
    }
This searcher fills the results in the first phase. May be put into
a search chain to ensure full results are present at an earlier
time than they would normally be.

@author havardpe
container-search/src/main/java/com/yahoo/prelude/searcher/FillSearcher.java