partial void DeleteT_POItem(T_POItem instance);
 partial void UpdateT_POItem(T_POItem instance);
 partial void InsertT_POItem(T_POItem instance);
		private void detach_T_POItem(T_POItem entity)
		{
			this.SendPropertyChanging();
			entity.T_Item = null;
		}
		private void attach_T_POItem(T_POItem entity)
		{
			this.SendPropertyChanging();
			entity.T_Item = this;
		}
		private void attach_T_POItem(T_POItem entity)
		{
			this.SendPropertyChanging();
			entity.T_PurchaseOrder = this;
		}