I'm attempting to get the GroupByRecordPresenter on a child record when the mouse moves over it using the following code: I'm setting this on a style for the DataRecordPresenter

		private void OnMouseEnter(object sender, MouseEventArgs e)
		{
			RecordPresenter rp = sender as RecordPresenter;
			if (rp == null) return;
			Debug.WriteLine("Success!");
			GroupByRecordPresenter gbrp = GroupByRecordPresenter.FromRecord(rp.Record) as GroupByRecordPresenter;
			if (gbrp == null) return;
		}

However, GroupByRecordPresenter.FromRecord always returns null, even though the GroupByRecordPresenter is loaded and visible in the grid. How can I obtain the GroupByRecordPresenter on mouseover?