After examining our immutable example implementation, we are not able to say that it covers all the functionalities of the imperative approach. For instance, it does not provide us with a way to change the producer of a product. After all, we cannot change it.

Whenever we need to change any property of the product, we need to go through the following process:

let mexBananas = FunctionalProduct(name: bananas.name, 
                                   price: bananas.price, 
                                   quantity: bananas.quantity, 
                                   producer: Producer(name: "XYZ", 
                                                      address: "New 
                                                      Mexico, Mexico")) 

This solution is verbose and does not look nice. Let's examine how we can improve this process.