public List<DataValidation> getDataValidations() {
if (_dataValidations == null) {
//populate the _dataValidations list
final DataValidityTable tb = _helper.getInternalSheet().getOrCreateDataValidityTable();
_dataValidations = new ArrayList<DataValidation>();
final RecordVisitor rv = new DVRecordVisitor();
tb.visitContainedRecords(rv);
}
return _dataValidations;
}