private ErrorMessage noSearchchain() {
        return ErrorMessage
                .createServerIsMisconfigured("Could not get search chain matching component specification: " + target);
    }
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