def execute() {

    FormVO formVO = formService.getFormDetails(true);

List<String> repeatedKeys = new ArrayList<>();
    repeatedKeys.add("XXXXX");
    repeatedKeys.add("XXXXX");

String repeatingRootNodeName = "XXXXXXXX";

    List<Map<String, String>> repeatedValues = formService.extractRepeatingFields(
        formVO.getXmlData(), 
        repeatingRootNodeName, 
        repeatedKeys
);

// Extracted values from the repeating fields can now be accessed and used as needed.

}