code: @Override
      public Map<Integer, Long> createUpdatedMap() {
          if (storageFile == null) {
              //In-Memory Stats Storage
              db = DBMaker.memoryDB().make();
          } else {
              db = DBMaker.fileDB(storageFile).closeOnJvmShutdown().transactionEnable() //Default to Write Ahead Log - lower performance, but has crash protection
                              .make();
          }
  
          updated = db.hashMap("updated").keySerializer(Serializer.INTEGER).valueSerializer(Serializer.LONG)
                          .createOrOpen();
          return updated;
      }
docs: Create the storage map
  
  @return