In one of the WWDC15 session videos, it made mention of Swift as a POP language.In Swift 2.0 there the notion of using extensions to entend types(class, struct enum).Here's the situation.I have a hierachy of classes with one superclass.That class has an init() method that subclass callsSince it's a superclass, I do not want it being instantiated.If I can be directed to some code examples or even a discussion on the subject, that would be great.Thanks!
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