:calls: `GET /organizations <http://developer.github.com/v3/orgs#list-all-organizations>`_
        :param since: integer
        :rtype: :class:`github.PaginatedList.PaginatedList` of :class:`github.Organization.Organization`

def get_organizations(self, since=github.GithubObject.NotSet):
        """
        :calls: `GET /organizations <http://developer.github.com/v3/orgs#list-all-organizations>`_
        :param since: integer
        :rtype: :class:`github.PaginatedList.PaginatedList` of :class:`github.Organization.Organization`
        """
        assert since is github.GithubObject.NotSet or isinstance(since, (int, long)), since
        url_parameters = dict()
        if since is not github.GithubObject.NotSet:
            url_parameters["since"] = since
        return github.PaginatedList.PaginatedList(
            github.NamedUser.NamedUser,
            self.__requester,
            "/organizations",
            url_parameters
        )