dataBindingClient = new DataBindingClient(app.getLoader());
Graph g = dataBindingClient.getStartGraph();
edu.uci.ics.jung.graph.Graph jungGraph = mapper.toJung(g);
LengthFunction f = app.getRenderer().getLengthFunction() ;
VisualizationViewer vv = null ;
if ( f == null)
vv = new VisualizationViewer(
new TemporalSpringLayout(jungGraph, 50), pr);
else