code: public static void index(final List<Instance> _instances)
          throws EFapsException
      {
          Indexer.index(new IndexContext().setAnalyzer(Index.getAnalyzer()).setDirectory(Index.getDirectory())
                          .setLanguage(Context.getThreadContext().getLanguage())
                          .setCompanyId(Context.getThreadContext().getCompany().getId()), _instances);
      }
docs: Index or reindex a given list of instances. The given instances m,ust be
  all of the same type!
  
  @param _instances the _instances
  @throws EFapsException the e faps exception