BetterResultViewModelExample.kt

class MagicCardSearchViewModel(
    private val getCardUseCase: GetMagicCardUseCase
): ViewModel() {

    fun onCardSearchClick() = viewModelScope.launch {
        when (val result = getCardUseCase(cardName)) {
            is Success -> // happy path 🎉
            is Error -> onGetCardError(result.error)
        }
    }
    
    private fun onGetCardError(error: GetMagicCardUseCaseError) {
        when (error) {
            is InvalidCardNameFormat -> //TODO
            is HttpUnsuccessfulCodeError -> //TODO
            is RemoteServerNotReachedError -> //TODO
            is UnexpectedApiCommunicationError -> //TODO
        }
    }
}