@Override
        public void fill(Result result,String summary, Execution execution, Connection connection) {
            result.hits().get(0).fields().put("filled",connection.getResponse());
        }
This is the kind of searcher which will be implemented by those who wish to create a searcher which is a
client to a clustered service.
The goal is to make writing this correctly as simple as possible.
container-search/src/test/java/com/yahoo/search/cluster/test/ClusteredConnectionTestCase.java