:calls: `GET /orgs/:org/outside_collaborators <http://developer.github.com/v3/orgs/outside_collaborators>`_
        :param filter_: string
        :rtype: :class:`github.PaginatedList.PaginatedList` of :class:`github.NamedUser.NamedUser`

def get_outside_collaborators(self, filter_=github.GithubObject.NotSet):
        """
        :calls: `GET /orgs/:org/outside_collaborators <http://developer.github.com/v3/orgs/outside_collaborators>`_
        :param filter_: string
        :rtype: :class:`github.PaginatedList.PaginatedList` of :class:`github.NamedUser.NamedUser`
        """
        assert (filter_ is github.GithubObject.NotSet or
                isinstance(filter_, (str, unicode))), filter_

        url_parameters = {}
        if filter_ is not github.GithubObject.NotSet:
            url_parameters["filter"] = filter_
        return github.PaginatedList.PaginatedList(
            github.NamedUser.NamedUser,
            self._requester,
            self.url + "/outside_collaborators",
            url_parameters
        )