> On Oct 17, 2017, at 5:06 PM, dangerwillrobinsondan...@gmail.com wrote:
> 
> Isn’t NSHTTPURLResponse a subclass of NSURLResponse?

Yes it is, but calling `((NSHTTPURLResponse*)response).statusCode` will still 
throw an exception if the response isn’t actually an instance of the subclass, 
because the base class doesn’t implement that property.

—Jens
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