vv = new VisualizationViewer<PipelineModule,Edge>(model);
//VertexLabelAsShapeRenderer<PipelineModule,Edge> vlasr = new VertexLabelAsShapeRenderer<PipelineModule,Edge>(vv.getRenderContext());
vv.setBackground(Color.WHITE);
vv.getRenderContext().setEdgeLabelTransformer(new ToStringLabeller<Edge>());
vv.getRenderContext().setVertexShapeTransformer(new VertexShapeTransformer(vv.getRenderContext()));
vv.getRenderContext().setVertexLabelTransformer(new org.apache.commons.collections15.Transformer<PipelineModule,String>(){
@Override public String transform(PipelineModule arg0) { return ""; }});
vv.getRenderer().setVertexRenderer(new VertexPainter<Edge>());
vv.getRenderer().getVertexLabelRenderer().setPosition(Position.CNTR);