swift - Cannot convert return expression of type 'NSFetchedResultsController' to return type 'NSFetchedResultsController<NSFetchRequestResult>' -


i'm trying convert bit of code swift 2 swift 3 , has been going fine until section of code:

var fetchedresultscontroller: nsfetchedresultscontroller<nsfetchrequestresult>{     if _fetchedresultscontroller != nil {         return _fetchedresultscontroller!     }

xcode brings error:

    cannot convert return expression of type 'nsfetchedresultscontroller' return type    'nsfetchedresultscontroller<nsfetchrequestresult>'

and i'm bit stumped on how fix


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