dataField.setSubtotal(STDataConsolidateFunction.Enum.forInt(function.getValue()));
Cell cell = getDataSheet().getRow(pivotArea.getFirstCell().getRow()).getCell(columnIndex);
cell.setCellType(Cell.CELL_TYPE_STRING);
dataField.setName(function.getName());
dataField.setFld(columnIndex);
dataFields.setCount(dataFields.sizeOfDataFieldArray());
}
/**
* Add column containing data from the referenced area.
* @param columnIndex the index of the column containing the data