:calls: `POST /repos/:owner/:repo/issues/:number/assignees <https://developer.github.com/v3/issues/assignees>`_
        :param assignee: :class:`github.NamedUser.NamedUser` or string
        :rtype: None

def add_to_assignees(self, *assignees):
        """
        :calls: `POST /repos/:owner/:repo/issues/:number/assignees <https://developer.github.com/v3/issues/assignees>`_
        :param assignee: :class:`github.NamedUser.NamedUser` or string
        :rtype: None
        """
        assert all(isinstance(element, (github.NamedUser.NamedUser, str, unicode)) for element in assignees), assignees
        post_parameters = {"assignees": [assignee.login if isinstance(assignee, github.NamedUser.NamedUser) else assignee for assignee in assignees]}
        headers, data = self._requester.requestJsonAndCheck(
            "POST",
            self.url + "/assignees",
            input=post_parameters
        )
        self._useAttributes(data)