code: public List<JournalManager> getNonFileJournalManagers() {
      List<JournalManager> list = new ArrayList<JournalManager>();
      for (JournalManager jm : getJournalManagers()) {
        if (!(jm instanceof FileJournalManager)) {
          list.add(jm);
        }
      }
      return list;
    }
docs: Return all non-file journal managers.