@Override
        public void modifyTargetQuery(Query query) {
            query.getModel().setSources(searchChainId.getName());
            query.getModel().setRestrict(schemas.get(0));
        }
The name of the query property containing the source name added to the query to each source by this
container-search/src/main/java/com/yahoo/search/federation/FederationSearcher.java