




 
The function  
instance
-refreshed is called inside select when its 
refresh
 argument is true and the instance 
instance
 has just been updated. 
The supplied method on standard-db-object does nothing. If your application needs to take action when a View Class instance has been updated by
(select ... :refresh t)
then add an 
instance-refresh
 method specializing on your subclass of standard-db-object.