partial void Deleteres_coombs_test(res_coombs_test instance);
 partial void Insertres_coombs_test(res_coombs_test instance);
 partial void Updateres_coombs_test(res_coombs_test instance);
		private void detach_res_coombs_test(res_coombs_test entity)
		{
			this.SendPropertyChanging();
			entity.check_bill = null;
		}