LifecycleStateUsage.kt

// Indicate the the screen should be closed
class ImageViewModel() : BaseViewModel() {

    @BoundMethod
    fun onExitFullscreenClicked() {
        lifecycleState.set(FinishedOk)
    }
}

// indicate that the screen should be finished and a result is returned
class LessonViewModel() : BaseViewModel() {
  
    var currentlySelectedId = 0
    ...

    @BoundMethod
    fun onSelectClicked() {
      lifecycleState.set(FinishedWithResult(
        RESULT_LESSON_SELECTED, 
        Intent().apply { putExtra("selectedId", currentlySelectedId) }
      ))
    }
}