def as_ul(self):
self._html_section = u'<STR_LIT>'<EOL>return super(XmlObjectForm, self).as_ul()<EOL>
Behaves exactly the same as Django Form's as_ul() method,
        except that it also includes the fields for any associated subforms
        in list format.

        Subforms, if any, will be grouped in a <ul> of class 'subform',
        with a heading based on the label of the field.