docs: private InvalidationTableList getInvalidationTableList(String cacheName) {  
  		InvalidationTableList  invalidationTableList = cacheinvalidationTables.get(cacheName);
  		if (invalidationTableList == null) {
  			synchronized (this) {
  				invalidationTableList = new InvalidationTableList();
  				cacheinvalidationTables.put(cacheName, invalidationTableList);
  			}
  		}
  		return invalidationTableList;
  	}