[Pharo-project] Is SystemChangeNotifier notifying about protocol changed (with what changed)?

Hi guys I'm trying to work on the integration of the new Rapckage implementation and for this I'm trying to shield myself from event and building system anouncements.... Now when a protocol is added in a class, I get a reorganized event but I do not get the changed element.... And I checked and I see that: notifyOfChangedCategoriesFrom: oldCollectionOrNil to: newCollectionOrNil (self hasSubject and: [oldCollectionOrNil ~= newCollectionOrNil]) ifTrue: [SystemChangeNotifier uniqueInstance classReorganized: self subject]. Am I correct to think that systemNotification does not raised what changed :( arghhhhhhh Stef