You should be able to look at the header in Swift for your Objective-C class 
and see what it should be.

> On Nov 11, 2019, at 8:06 PM, Steve Christensen via Cocoa-dev 
> <cocoa-dev@lists.apple.com> wrote:
> 
> Yep, I understand what it does. I’m trying to get the same class-or-subclass 
> behavior during compilation. I’d looked at the stack overflow article 
> earlier, so I’ll check out the Swift forum to see what’s there. Thanks.
> 
>> On Nov 11, 2019, at 4:43 PM, Quincey Morris 
>> <quinceymor...@rivergatesoftware.com> wrote:
>> 
>>> On Nov 11, 2019, at 15:07 , Steve Christensen via Cocoa-dev 
>>> <cocoa-dev@lists.apple.com <mailto:cocoa-dev@lists.apple.com>> wrote:
>>> 
>>> Some existing Obj-C methods are of the form:
>>> 
>>>     + (nullable __kindof NSManagedObject) someFooThing;
>>> 
>>> Right now I have
>>> 
>>>     class var someFooThing: NSManagedObject?
>> 
>> AFAIK, “__kindof” only affects the ability to assign one Obj-C class pointer 
>> to a variable of a different but compatible (kind of) type. It doesn’t 
>> change the actual type of the variable, nor does it (again AFAIK) change the 
>> ability to assign without errors in Swift. Also see here for some 
>> informative discussion:
>> 
>>      https://stackoverflow.com/questions/31399208/ios-kindof-nsarray 
>> <https://stackoverflow.com/questions/31399208/ios-kindof-nsarray>
>> 
>> I suggest you ask about this on forums.swift.org <http://forums.swift.org/>. 
>> If there’s an alternative, someone there will know.
> 
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