code: @Override protected void onSaveInstanceState(Bundle outState) {
      super.onSaveInstanceState(outState);
      saveDraggableState(outState);
      saveLastPlaceLoadedPosition(outState);
    }
docs: Save the DraggablePanel state to restore it once the activity lifecycle be rebooted.
  
  @param outState bundle to put the DraggableState information.