public void Undo()
{
if (_previousBowlState == null)
{
throw new InvalidOperationException("No actions to undo");
}
StoneIDs = _previousBowlState.StoneIDs.ToList();
_previousBowlState = _previousBowlState.PreviousState;
PreviewStoneIDs = StoneIDs.ToList();
}
public void PrepForStateChange()
{
_previousBowlState = new PreviousBowlState(StoneIDs.ToList(), _previousBowlState);
}
