/// <summary>
 /// Save the shape stars.
 /// </summary>
 /// <param name="ID">The ID of the shape.</param>
 /// <param name="stars">Stars.</param>
 public static void SaveShapeStars(int ID, ShapesManager.Shape.StarsNumber stars)
 {
     PlayerPrefs.SetInt(GetStarsStrKey(ID), CommonUtil.ShapeStarsNumberEnumToIntNumber(stars));
     PlayerPrefs.Save();
 }