partial void DeleteREADING_PRACTICE(READING_PRACTICE instance);
 partial void InsertREADING_PRACTICE(READING_PRACTICE instance);
 partial void UpdateREADING_PRACTICE(READING_PRACTICE instance);
	private void detach_READING_PRACTICEs(READING_PRACTICE entity)
	{
		this.SendPropertyChanging();
		entity.UNIT = null;
	}