public HashMap<Element,Topology> follow = new HashMap<Element,Topology>();
public HashMapBag<Element,Element> ys = new HashMapBag<Element,Element>();
public HashMap<Element,Topology> atoms = new HashMap<Element,Topology>();
public HashMap<Element,Topology> follow = new HashMap<Element,Topology>();
public HashMapBag<Element,Element> ys = new HashMapBag<Element,Element>();
public HashMap<Element,Topology> atoms = new HashMap<Element,Topology>();