SwiftTip4.swift

struct Contact {
  let firstName: String
  let lastName: String
  let idCode: String
  let address: CNPostalAddress
}

extension Contact: CustomStringConvertible {
  var description: String {
    "\(firstName) \(lastName)"
  }
}
print (contact) // prints description
// John Doe

dump(contact) // prints all the properties v John Doe
// - firstName: "John"
// - lastName: "Doe"
// - idCode:
// "id123"
// - address: <CMutablePostalAddress: 0x600000338410: street=, subLocality=, city=Tokyo, subAdministrativeArea=, state=, postalCode=, country=Japan, countryCode=> #0
// - super: CNPostalAddress
// - super: NSObject