[swift-evolution] Abstract methods

[Tino Heth]

> An abstract base class can expose private or internal abstract requirements to its implementation subclasses while exporting a different interface for external users.
I think what you want for this is real orthogonality of access rights (being able to declare a method that can’t be called, but just overridden) — but I fear this option died with „open“, and the topic is scorched earth for the next years
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