def content(self):
            """
            Instantiate and return a ``ContentProxy``. You can use your own
            custom ``ContentProxy`` by assigning a different class to the
            ``content_proxy_class`` member variable.
            """

            if not hasattr(self, "_content_proxy"):
                self._content_proxy = self.content_proxy_class(self)

            return self._content_proxy

            Instantiate and return a ``ContentProxy``. You can use your own
            custom ``ContentProxy`` by assigning a different class to the
            ``content_proxy_class`` member variable.
            
feincms/models.py