``` sealed class Envelope lt T E gt class Success val data T kotlinlang #getting-started

``` sealed class Envelope<T, E> { class ...

cdepillabout

06/13/2016, 1:59 AM

Copy code

sealed class Envelope<T, E> {
    class Success(val data: T): Envelope<T,E>()
    class Error(val err: E, val extra: String): Envelope<T, E>()
}