Running when over restaurantNearby state tree

whenOnTree.kt

when (restaurantNearby) {
  is RestaurantNearby.Loading -> // Tell user the data is loading
  
  is RestaurantNearby.Loading.Done -> {
    restaurantNearby.reloadData() // Attach this function to some user feedback.
  
    when (restaurantNearby) {
      is RestaurantNearby.Loading.Done.Ready -> restaurantNearby.restaurants // Do something with this list.
      
      is RestaurantNearby.Loading.Done.Empty -> // Tell the user there was no data found.
      
      is RestaurantNearby.Loading.Done.Error -> {
        restaurantNearby.message // Show this message to the user.
        restaurantNearby.throwable // Catch this and act on it as needed.
      }
    }
  }
}