code: public int getCount(G g) {
          Set<T> typeCounts = g.edgeTypes();
          LinkedList<Map.Entry<G,Integer>> graphs = typesToGraphs.get(typeCounts);
          if (graphs == null) 
              return 0;
          
          for (Map.Entry<G,Integer> e : graphs) {
              if (isoTest.areIsomorphic(g, e.getKey())) 
                  return e.getValue();
          }
          return 0;
      }
docs: Returns the count for graphs that are isomorphic to the provided graph.