code: public void save(String storageName) {
          //store the objects on storage
          storageEngine.saveObject("data", data);
  
          //rename the storage
          storageEngine.rename(storageName);
  
          //reload the data of the object
          data = storageEngine.loadObject("data", Data.class);
  
          //mark it as stored
          stored = true;
      }
docs: Saves the Dataframe to disk.
  
  @param storageName