swift enum learning

enum Either<T1, T2> {
    case Left(T1)
    case Right(T2)
}
public class MyClas {
    func mytest<T:CustomStringConvertible>(a:T) ->String{
        return "\(a)"
    }
    func test(list:[String]) ->String{
        return "abcd"
    }
    func test(list:[String:String]) ->String{
        return "abcdf"
    }
    func process(json:[String:String]) -> Either<String,[String]>{
        
        guard let name = json["name"]  else{
            return .Right(["array"])
        }
        return .Left(name)
    }
}

        let  my = MyClas()
        print(my.mytest(["this is array"]))
        print(my.mytest(["key":"value"]))
        let name = my.process(["name" : "yarshure"])
        switch name{
        case .Left(let text):
            print(text)
        case .Right(let list):
            print(list)
            
        }