public void printAllModels(String family){
    HashMap model_map = family_models_map.get(family);
     if (model_map==null) return;
     Iterator<Map.Entry<String,Integer>> it = model_map.entrySet().iterator();
     while(it.hasNext()){
         Map.Entry<String,Integer> entry = it.next();
         String model = entry.getKey();
         System.out.println("--"+model);  
     }
     return;
  }