Pharo Issue Tracker - Manuscript (Case [Issue]22719) Crosscutting and Misc - The NewValueHolder has no way how to unregister subscribers

Manuscript Notification

	Pavel Krivanek opened Case 22719: The NewValueHolder has no way how to unregister subscribers and assigned it to Everyone: Bug in Crosscutting and Misc: 1. Pharo Image • You are subscribed to this case

The NewValueHolder, particularly CollectionValueHolder, has methods to register subscribers to changes (like whenAddedDo:) but no way how to unsubscribe. That means that as soon as you have the value holder in the global space, it will cause an everlasting memory leak.

	Priority: 3 – Must Fix		Status: Work Needed
	Assigned to: Everyone		Milestone: Pharo8.0

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