private void detach_sets_pieces(sets_pieces entity)
		{
			this.SendPropertyChanging();
			entity.pieces = null;
		}
		private void attach_sets_pieces(sets_pieces entity)
		{
			this.SendPropertyChanging();
			entity.pieces = this;
		}
 partial void Updatesets_pieces(sets_pieces instance);
 partial void Deletesets_pieces(sets_pieces instance);
 partial void Insertsets_pieces(sets_pieces instance);