SESSION createAndStore(Map<KEY, SESSION> registry, PARAMS p, KEY key) {
            SESSION session = create(p);
            registry.put(key, session);
            return session;
        }
Class to encapsulate access to slobrok sessions.

@author Steinar Knutsen
@author Einar Rosenvinge
container-messagebus/src/main/java/com/yahoo/container/jdisc/messagebus/SessionCache.java