@Override
    public void clear() {
      this.vars = null;
      setRowOffsetIsSet(false);
      this.rowOffset = 0;
      setColOffsetIsSet(false);
      this.colOffset = 0;
      setRowsIsSet(false);
      this.rows = 0;
      setColsIsSet(false);
      this.cols = 0;
      this.format = null;
    }
@Override
    public void clear()