Raised after the final PersistentVariablesSource.EndUpdating call. This can be used when you wish to respond to value change events but wish to do a single update at the end instead of 1 per change. For example, if you wanted to change the value of multiple global variables that a smart string was using then changing each value would result in a new string being generated, by using begin and end the string generation can be deferred until the final change so that only 1 update is performed.