partial void DeleteSignNode(SignNode instance);
 partial void UpdateSignNode(SignNode instance);
		private void detach_SignNodes(SignNode entity)
		{
			this.SendPropertyChanging();
			entity.Depts = null;
		}
 partial void InsertSignNode(SignNode instance);
		private void attach_SignNodes(SignNode entity)
		{
			this.SendPropertyChanging();
			entity.Depts = this;
		}