partial void DeleteLISTENING_PRACTICE(LISTENING_PRACTICE instance);
 partial void InsertLISTENING_PRACTICE(LISTENING_PRACTICE instance);
 partial void UpdateLISTENING_PRACTICE(LISTENING_PRACTICE instance);
	private void detach_LISTENING_PRACTICEs(LISTENING_PRACTICE entity)
	{
		this.SendPropertyChanging();
		entity.UNIT = null;
	}