code: public void initSession(IStore is) {
          _store = is;
          _storeCallback = is.getStoreCallback();
          _sessions = ((BackedStore) is).getSessions();
          _smc = ((MemoryStore) _store).getSessionManagerConfig();
          if (com.ibm.websphere.ras.TraceComponent.isAnyTracingEnabled() && LoggingUtil.SESSION_LOGGER_WAS.isLoggable(Level.FINE)) {
              appNameAndIdString = getAppNameAndID();
          }
          _sessions.setStoreCallback(_storeCallback);
      }
docs: /*
  initSession - used to initialize a session when the default (no-arg)
  constructor is used.