layers.clear();
layers.addAll(map.getLayersInternal());
layers.add(new SelectionLayer(map.getLayersInternal().get(0)));
layers.add(new SelectionLayer(map.getLayersInternal().get(1)));
creator.reset();
CompositeRenderContextImpl comp=new CompositeRenderContextImpl();
comp.addContexts(creator.getConfiguration());
Iterator iter = comp.getContexts().iterator();