:calls: `GET /repos/:owner/:repo/pulls/:number/comments <http://developer.github.com/v3/pulls/comments>`_
        :param since: datetime.datetime format YYYY-MM-DDTHH:MM:SSZ
        :rtype: :class:`github.PaginatedList.PaginatedList` of :class:`github.PullRequestComment.PullRequestComment`

def get_review_comments(self, since=github.GithubObject.NotSet):
        """
        :calls: `GET /repos/:owner/:repo/pulls/:number/comments <http://developer.github.com/v3/pulls/comments>`_
        :param since: datetime.datetime format YYYY-MM-DDTHH:MM:SSZ
        :rtype: :class:`github.PaginatedList.PaginatedList` of :class:`github.PullRequestComment.PullRequestComment`
        """
        assert since is github.GithubObject.NotSet or isinstance(since, datetime.datetime), since
        url_parameters = dict()
        if since is not github.GithubObject.NotSet:
            url_parameters["since"] = since.strftime("%Y-%m-%dT%H:%M:%SZ")
        return github.PaginatedList.PaginatedList(
            github.PullRequestComment.PullRequestComment,
            self._requester,
            self.url + "/comments",
            url_parameters
        )