I am implementing a DrawFilter and am inside of the GetPhasesToFilter method and have the following code:

public DrawPhase GetPhasesToFilter(ref UIElementDrawParams drawParams)
{
	var cell = drawParams.Element as RowCellAreaUIElement;
	if (cell != null)
	{
		var ultraCell = (UltraGridCell)cell.GetContext();
		// do stuff with ultraCell and return the appropriate draw phase
	}
	return DrawPhase.None;
}

However, the context being retrieved is an UltraGridRow, not a Cell. I have tried using .GetContext(typeof(UltraGridCell)), but then just get null as my result.
In searching the forums, I have seen previous users remark that they have used GetContext on a cell UIElement and found success in retrieving the UltraGridCell.

How can I get the UltraGridCell from within this method?

Thanks