dk_mvvm_9.kt

// before
sealed class NetworkState {
    class Init : NetworkState()
    class Loading : NetworkState()
    class Success(val item: Item) : NetworkState()
    class Error(val throwable: Throwable?) : NetworkState()
}

// after
sealed class NetworkState<out T> {
    class Init : NetworkState<Nothing>()
    class Loading : NetworkState<Nothing>()
    class Success<out T>(val item: T) : NetworkState<T>()
    class Error(val throwable: Throwable?) : NetworkState<Nothing>()
}