CoreDataCheckIfInferredAutomaticMappingIsPossible.swift

        // example to show how to check if core data can infers a mapping model by itself
        // do not forget to add the .momd to you model object package!!!!
        // https://developer.apple.com/documentation/coredata/nsmappingmodel/1506468-inferredmappingmodelforsourcemod
        // SWIFT 4
        
        if let previousModelURL = Bundle.main.url(forResource: "YOURMODELNAME.momd/YOURMODELVERSION 2", withExtension: "mom"),
            let previousModel = NSManagedObjectModel(contentsOf: previousModelURL),
            let currentModelURL = Bundle.main.url(forResource: "YOURMODELNAME.momd/YOURMODELVERSION 3", withExtension: "mom"),
            let currentModel = NSManagedObjectModel(contentsOf: currentModelURL) {
            
            do {
                let inferredModel = try NSMappingModel.inferredMappingModel(forSourceModel: previousModel,
                                                                            destinationModel: currentModel)
                // do the check here!
            } catch {
                // process error
            }
        }