Example Nearby Restaurant State Tree

RestaurantNearby.kt

 sealed class RestaurantNearby() {
   sealed class Loading() : RestaurantNearby() {
        //Code for getting Location, and API call
        sealed class Done() : Loading() {
          fun reloadData() {}
          class Ready(val restaurants: List<Restaurant>) : Done()
          class Empty() : Done()
          class Error(val message: String, val throwable: Throwable?) : Done()
        }
    }
}