internal class ExampleViewModel : ViewModel() {

    private val disposables = CompositeDisposable()

    val showLoading = MutableLiveData<Boolean>()

    val viewState = MutableLiveData<ExampleViewState>()

    val posts = MutableLiveData<List<Post>>()

    fun fetchPosts() {
        posts.value = emptyList()
        viewState.value = ExampleViewState.Empty
    }

    data class Post(val name: String = "")
}

sealed class ExampleViewState {
    object NetworkErrorState : ExampleViewState()
    object ErrorState : ExampleViewState()
    object Empty : ExampleViewState()
    object ShowList : ExampleViewState()
}