template <typename V, typename E, typename W>
class Edge{

public:
  //get methods...

private:
  V source;
  V destination;
  E label;
  W weight;
}


template <typename V, typename E, typename W>
class AdjacencyListGraph{

public:
  //graph methods...

private:

  HashTable< V, Hashtable< V, Edge<V,E,W> > > ;

}