code: public static String parsePIDandLabel(String fileName) {
          if (fileName == null || fileName.isEmpty()) {
              return null;
          }
          int pidIndex = fileName.indexOf(TIMESEPARATOR);
          int labelIndex = fileName.indexOf(LABELSEPARATOR);
  
          // If no time separator or it's a part of the label the full name is the result
          if (pidIndex < 0 || (labelIndex > 0 && labelIndex < pidIndex)) {
              return fileName;
          }
  
          return fileName.substring(pidIndex + 1);
      }
docs: Retrieves the PID and label combined out of the directory name.
  
  @param fileName
  @return