public abstract object StartEditing(PlaceItemExtension pie);
 public override object StartEditing(PlaceItemExtension pie)
 {
     piae = pie as PlaceItemAnimationExtension;
     data = piae.ToString ();
     return this;
 }
            public override object StartEditing(PlaceItemExtension pie)
            {
                pice = pie as PlaceItemCharacterExtension;

                return this;
            }
        public override object StartEditing(PlaceItemExtension pie)
        {
            pice = pie as PlaceItemColorExtension;
            number = pice.chosenColor;

            return this;
        }