The current implementation provides notifications via callbacks to a delegate. Using a delegate with callbacks is limiting a number of ways. The callback names are very ambiguous, the callbacks must either be on a separate object (more boilerplate), or the callback must be public for HysteresisActivity to call them, or friends get involved. Without the boilerplate of extra delegate objects it's hard to scale use of these objects – a single object can't serve as a delegate for multiple HysteresisActivity members.
Created attachment 243282 [details]
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Committed revision 177295.