code: public static String parseLabel(String fileName) {
          if (fileName == null || fileName.isEmpty()) {
              return null;
          }
          int labelIndex = fileName.indexOf(LABELSEPARATOR);
          return labelIndex < 0 ? null : fileName.substring(labelIndex + 1);
      }
docs: Retrieves the label out of the directory name (Qualifier 3)
  
  @param fileName
  @return