partial void Deleteres_accident_ab(res_accident_ab instance);
 partial void Insertres_accident_ab(res_accident_ab instance);
 partial void Updateres_accident_ab(res_accident_ab instance);
		private void detach_res_accident_ab(res_accident_ab entity)
		{
			this.SendPropertyChanging();
			entity.check_bill = null;
		}