SelectionAdorner.getSelectionFrameUnderGroup Method
        
 Gets the selection frame under group.
         
        Parameters
        
            - targetGroupFrame
            
 
            - 
                
Type: HTMLElement - May be null
(Optional) The group to get selection frame under for. 
            - pagePosition
            
 
            - 
                
Type: Coordinates - May be null
 (Optional) The coordinates in dundas.controls.CoordinateKind.PAGE of the targetGroup for retrieving the group member under.