ViewEffect in ViewModel sample

ViewEffectSample.kt

// ViewState
sealed class ViewEffect {
    data class ShowToast(val message: String) : ViewEffect()
}

// Set up LiveData
private val _viewEffectPublisher: MutableLiveData<Event<ViewEffect>>()
val viewEffectPublisher = LiveData<Event<ViewEffect>>
    get() = _viewEffectPublisher

// Post an event
fun someMethod() {
    _viewEffectPublisher.value = Event(ViewEffect.ShowToast("Hello!"))
}