@Override
    public void fill(Result result, String summaryClass, Execution execution) {
        Execution next = createForward(execution);
        if (next == null)
            badFill(result.hits());
        else
            next.fill(result, summaryClass);
    }
A lightweight searcher to forward all incoming requests to a single search
chain defined in config. An alternative to federation searcher when standard
semantics are not necessary for the application.

@see FederationSearcher
@author Steinar Knutsen
container-search/src/main/java/com/yahoo/search/federation/ForwardingSearcher.java