partial void Deletereaction_table_record(reaction_table_record instance);
 partial void Insertreaction_table_record(reaction_table_record instance);
 partial void Updatereaction_table_record(reaction_table_record instance);
		private void detach_reaction_table_record(reaction_table_record entity)
		{
			this.SendPropertyChanging();
			entity.check_bill = null;
		}