I want to allow users to select and unselect parcels in my map. The select works great, becauseGraphicsLayer.add() calls a "refresh" method of some sort that draws my graphics layer when invoked. Unfortunately, when I call GraphicsLayer.remove(), that "refresh" method isn't invoked, and my graphics layer in the map is not updated, showing the graphic as still selected. How do I remove a graphic from a GraphicsLayer and have the map update? I'm on version 2.8 of the api. Thanks.