@Override
    public boolean isSet(_Fields field) {
      if (field == null) {
        throw new java.lang.IllegalArgumentException();
      }

      switch (field) {
      case VARS:
        return isSetVars();
      case ROW_OFFSET:
        return isSetRowOffset();
      case COL_OFFSET:
        return isSetColOffset();
      case ROWS:
        return isSetRows();
      case COLS:
        return isSetCols();
      case FORMAT:
        return isSetFormat();
      }
      throw new java.lang.IllegalStateException();
    }
@Override
    public boolean isSet(_Fields field)