addDataColumn(columnIndex, true);
addDataField(function, columnIndex);
//Only add colfield if there is already one.
if (pivotTableDefinition.getDataFields().getCount() > 1) {
CTColFields colFields;
if(pivotTableDefinition.getColFields() != null) {
colFields = pivotTableDefinition.getColFields();
} else {
colFields = pivotTableDefinition.addNewColFields();
}
colFields.addNewField().setX(-2);
colFields.setCount(colFields.getFieldList().size());
}
}