private Connectivity getConnectivity(BlockItem current) {
        if (!(current instanceof TaggableItem t)) {
            return null;
        }
        if (t.getConnectedItem() == null) {
            return null;
        }
        return new Connectivity(t.getConnectedItem(), t.getConnectivity());
    }
Replaces query terms with their stems

@author Mathias Lidal
@author bratseth
@author Steinar Knutsen
container-search/src/main/java/com/yahoo/prelude/querytransform/StemmingSearcher.java