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struct Processor {
var modelNumber: Int
init() {
self.modelNumber = 21043
struct Computer {
var processor: Processor?
init(processor: Processor?) {
self.processor = processor
let myComputer = Computer(processor: Processor())
if let modelNumber = myComputer.processor?.modelNumber {
print("The model number of the processor is \(modelNumber)")
} else {
print("Seems like you need a processor for your computer")
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