I have one class with some Struct as property that I can convert the json to the data type like following

var user = userData
print(userData)
/// output
/// {
///   "meals": [
///     {
///       "dinner": "beef",
///       "cloth": "A"
///     }
///   ],
///   "cars": [
///     {
///       "model": "Y",
///       "color": "white"
///     },
///     {
///       "model": "x",
///       "color": "black"
///     }
///   ]
/// }

once I get the data type. I can modify the value of property like following

print(user.meals[0].dinner)  // Output: beef
userData.meals[0].dinner = "chicken"
print(user.meals[0].dinner)  // Output: chicken

however, how can I create a function based on keypath so I can do something like

user.updateValue(userData, keypath: User.meals[0].dinner, to: "chicken")
user.updateValue(userData, keypath: User.cars[1].color, to: "red")
...

because I do not want to create multiple function to update the meals or cars

class User {
    var name: String
    
    init(name: String) {
        self.name = name
    }
    
}

extension User {
    enum Color {
        case green, yellow, red, blue
    }
    
    struct Meal {
        var dinner: String
        var cloth: Color
    }
    
    struct Car {
        var model: String
        var color: Color
    }
}