* Creates an unnamed function. Make sure the name of the function is set using {@link #setName} before the function
* is added to the report's function collection.
*/
public IndexDataGeneratorFunction()
{
this.pageFunction = new PageFunction();
this.indexSeparator = ".";
this.model = new TypedTableModel();
this.dataFormula = new FormulaExpression();
this.dataStorage = new TreeMap<String,IndexDataHolder>();
}