dynamic resymbolization/duplicate layer?

I am trying to move over a custom silverlight module that used the duplicate layer function to add a dynamically sybmolized layer to the viewer.

Silverlight API has under Geocortex.Client.Layer the methods to SetRenderer and DuplicateLayer so that I could do this:

System.Action<Geocortex.Essentials.Client.Layer,Exception> duplicateLayerAction = null;

 

duplicateLayerAction = duplicateLayerCallback;           

 

layer.DuplicateLayer(false, renderer, title, title, duplicateLayerAction);

I am not seeing anything comparable in the js api unless I am missing something.  Are there any plans to add this support soon?  Alternatively is there a way I can add a new layer to the viewer providing my own renderer?

Marc