code: public void batchUpdate(HashMap invalidateIdEvents, HashMap invalidateTemplateEvents, ArrayList pushEntryEvents, ArrayList aliasEntryEvents, CacheUnit cacheUnit) {  //CCC
  	  // nothing to do for NullNotification
     }
docs: This applies a set of invalidations and new entries to this CacheUnit,
  including the local internal cache and external caches registered
  with this CacheUnit.
  
  @param invalidateIdEvents A Vector of invalidate by id events.
  @param invalidateTemplateEvents A Vector of invalidate by template events.
  @param pushEntryEvents A Vector of cache entries.