StockListViewModel.kt

internal class StockListViewModel @Inject constructor(
    private val interactor: StockListInteractor
) : ViewModel() {

    private val _stocks by lazy {
        val data = MutableLiveData<List<Stock>>()
        interactor
            .stocks()
            .subscribe({ data.value = it }, Timber::e)
        data
    }
    internal val stocks: LiveData<List<Stock>> by lazy { _stocks }
}