Get information of a single pull request.
        :param request_id: the id of the request
        :return:

def request_info(self, request_id):
        """
        Get information of a single pull request.
        :param request_id: the id of the request
        :return:
        """
        request_url = "{}pull-request/{}".format(self.create_basic_url(),
                                                 request_id)

        return_value = self._call_api(request_url)
        return return_value