}
final String fieldName = (String) element.getAttribute(AttributeNames.Core.NAMESPACE, AttributeNames.Core.FIELD);
if (o instanceof FieldAggregationFunction)
{
final FieldAggregationFunction fo = (FieldAggregationFunction) o;
fo.setField(fieldName);
}
final Object labelFor =
element.getAttribute(AttributeNames.Wizard.NAMESPACE, AttributeNames.Wizard.LABEL_FOR);
if (labelFor == null)