def comment(self, comment):
        """ Add a :class:`Comment <pypump.models.comment.Comment>`
        to the object.

        :param comment: A :class:`Comment <pypump.models.comment.Comment>`
            instance, text content is also accepted.

        Example:
            >>> anote.comment(pump.Comment('I agree!'))

            """
        if isinstance(comment, six.string_types):
            comment = self._pump.Comment(comment)

        comment.in_reply_to = self
        comment.send()