public void addVis(Object parent, VisualizationItem vis) {
    vistree.add(parent, vis);
    notifyFactories(vis);
    visChanged(vis);
  }
public void addVis ( Object parent , VisualizationItem vis ) { vistree . add ( parent , vis ) ; notifyFactories ( vis ) ; visChanged ( vis ) ; }
Add (register) a visualization.

@param parent Parent object
@param vis Visualization