Documentation says what it checks for item to respond to specific selectors. There are no selectors in Swift, so new implementation should check for protocol conformance instead, I guess. Any ideas? Should new protocol be introduced?
Class reference: https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSArray_Class/#//apple_ref/occ/instm/NSArray/descriptionWithLocale:indent :
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