public Map<String, ArrayList> prepareLoadersByProductFamily() {
        ArrayList <Loader> allLoaders = Loader.getAllLoaders();
        Map<String, ArrayList> loadersByFamily = new HashMap<String, ArrayList> ();
        
        for(Loader selectedLoader : allLoaders) {
            ArrayList loaderList = loadersByFamily.get(selectedLoader.getProductFamily());
            
            if (loaderList == null) {
                loaderList = new ArrayList ();
                loadersByFamily.put(selectedLoader.getProductFamily(), loaderList);
            }
            
            loaderList.add(selectedLoader);
            
            //System.out.println(s);
        }
         
        return loadersByFamily;
    }