docs: public static void setDefaultStorageFileProvider ()
    {
      setStorageFileProvider (aMetadata -> {
        final LocalDateTime aNow = PDTFactory.getCurrentLocalDateTime ();
        final String sFilename = StringHelper.getConcatenatedOnDemand (PDTIOHelper.getLocalDateTimeForFilename (aNow),
                                                                       "-",
                                                                       aMetadata.getErrorID ()) +
                                 ".xml";
        return WebFileIO.getDataIO ()
                        .getFile ("internal-errors/" +
                                  aNow.getYear () +
                                  "/" +
                                  StringHelper.getLeadingZero (aNow.getMonthValue (), 2) +
                                  "/" +
                                  sFilename);
      });
    }