sealed class Result<out T : Any?, out R: String?> {
    class ResultWrapper<out T : Any?, out R: String?>(val data: T, val message: String?) : Result<T, R>()
    class Failure<out T: Any?, out R: String?>(val data: T, val message: String?): Result<T, R>()
    class Error(val exception: Throwable) : Result<Nothing, Nothing>()
}