@Override
 public List<? extends Persistable> getAll() {
   try {
     List<ArrayList<String>> result;
     for (List<String> list : (result = xclAdaptee.read(file))) {
       // MappingStrategy<? extends Persistable> ms = TODO
       processLines();
     }
   } catch (BiffException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
   } catch (IOException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
   }
   return null;
 }