def dismiss(self, message):
        """
        :calls: `PUT /repos/:owner/:repo/pulls/:number/reviews/:review_id/dismissals <https://developer.github.com/v3/pulls/reviews/>`_
        :rtype: None
        """
        assert isinstance(message, (str, unicode)), message
        post_parameters = {'message': message}
        headers, data = self._requester.requestJsonAndCheck(
            "PUT",
            self.pull_request_url + "/reviews/%s/dismissals" % self.id,
            input=post_parameters
        )
:calls: `PUT /repos/:owner/:repo/pulls/:number/reviews/:review_id/dismissals <https://developer.github.com/v3/pulls/reviews/>`_
        :rtype: None