@IBAction func testing(_ sender: Any) {
    let url = URL(string: "http://example.com/cars/mustang")

    let task = URLSession.shared.dataTask(with: url!) { data, response, error in
        guard error == nil else {
            print(error!)
            return
        }
        guard let data = data else {
            print("Data is empty")
            return
        }
        let json = try! JSONSerialization.jsonObject(with: data, options: [])
        print(json)
    }
    task.resume()
}

(
    {
    color = "red";
    engine = "5.0";
    }
)

let json = try! JSONSerialization.jsonObject(with: data, options: [])

  guard let jsonArray = json as? [[String: String]] else {
            return
  }
  let carColor = jsonArray[0]["color"]
  print(carColor!) // output: red

class CarInfo: Decodable

var color: String

var engine: String

enum CarInfoCodingKey: String, CodingKey {
   case color
   case engine
}

required init(from decoder: Decoder) throws

class CarInfo: Decodable {
var color: String
var engine: String
enum CarInfoCodingKey: String, CodingKey {
case color
case engine
}
public init(from decoder: Decodabler) throws {
let container = try decoder.container(keyedBy: CarInfoCodingKey.self)
self.color = try container.decode(String.self, forKey: .color)
self.engine = try contaire.decode(String.self, forKey: .engine)
}
}

let carinfo = try JsonDecoder().decode(CarInfo.self, from: jsonData)