code: public boolean isSet(_Fields field) {
      if (field == null) {
        throw new IllegalArgumentException();
      }
  
      switch (field) {
      case NAME:
        return is_set_name();
      case PARALLEL:
        return is_set_parallel();
      case TYPE:
        return is_set_type();
      case TASK_IDS:
        return is_set_taskIds();
      case ERRORS:
        return is_set_errors();
      }
      throw new IllegalStateException();
    }
docs: Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise