def is_descendant_of(self, node):
        """
        :returns: ``True`` if the node if a descendant of another node given
            as an argument, else, returns ``False``
        """
        return self.pk in [obj.pk for obj in node.get_descendants()]
:returns: ``True`` if the node if a descendant of another node given
            as an argument, else, returns ``False``