SimpleScreen.kt

interface SimpleContainer {
  var text: String
}

class SimpleScreen(
  val name: String
) : Screen<SimpleContainer> {
 
  override fun attach(v: SimpleContainer) {
    v.text = "Hello, $name!" 
  }
  
  override fun saveInstanceState() = savedState {
   it["name"] = name
  }
  
  companion object {
   
    fun from(savedState: SavedState) : SimpleScreen {
      return SimpleScreen(savedState["name"])
  }
}