code: @SuppressWarnings("unchecked")
      public HashMap<String, HashMap<String, String>> getMetaData() {
          HashMap<String, HashMap<String, String>> result = new HashMap<String, HashMap<String, String>>();
          for (MetaRecord mr : meta) {
              result.put((String) mr.get(FieldName.META_FILENAME),
                      (HashMap<String, String>) mr.get(FieldName.META_PROPERTIES));
          }
          return result;
      }
docs: Returns a file to properties map for each available {@link MetaRecord}
  
  @return