Graph filtering

Hi
i tried using GraphHider for filtering my graph
i created a CustomGraphUpdater which uses a GraphHider to hide some nodes/edges
and added it ofcourse to my graph builder
not all kind of mess happens
something like this :
public void update(Graph2D graph, Graph2DView view) {
long start = System.currentTimeMillis();
graphHider = GraphManager.getGraphManager().createGraphHider(graph);
graphHider.unhideAll();
//hides some nodes here
}

and well, nothing is hiden

am i doing something wrong ?