When testing out my own URLProtocol subclass, I printed a list of the other subclasses the system knows about. I saw a "NSAboutURLProtocol" there. Does anyone know what it does?
What is the NSAboutURLProtocol class
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I think it handles the "about:" URL scheme, though I have no idea what "handles" means in this context. It probably returns a blank document with a 200 status code or something.