':returns: tuple:
* OrderedDict: attributes
* string or None: content
* boolean: force_display display the tag if the content and default_content are None'

def _get_field(self, record, field_name, expression, tagName, field_options, options, values):

    return self._get_widget(getattr(record, field_name, None), expression, tagName, field_options, options, values)
