code: public boolean isSet(_Fields field) {
      if (field == null) {
        throw new IllegalArgumentException();
      }
  
      switch (field) {
      case ID:
        return is_set_id();
      case NAME:
        return is_set_name();
      case STATUS:
        return is_set_status();
      case UPTIME_SECS:
        return is_set_uptimeSecs();
      case NUM_TASKS:
        return is_set_numTasks();
      case NUM_WORKERS:
        return is_set_numWorkers();
      case ERROR_INFO:
        return is_set_errorInfo();
      }
      throw new IllegalStateException();
    }
docs: Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise