:calls: `GET /user/subscriptions/:owner/:repo <http://developer.github.com/v3/activity/watching>`_
        :param subscription: :class:`github.Repository.Repository`
        :rtype: bool

def has_in_subscriptions(self, subscription):
        """
        :calls: `GET /user/subscriptions/:owner/:repo <http://developer.github.com/v3/activity/watching>`_
        :param subscription: :class:`github.Repository.Repository`
        :rtype: bool
        """
        assert isinstance(subscription, github.Repository.Repository), subscription
        status, headers, data = self._requester.requestJson(
            "GET",
            "/user/subscriptions/" + subscription._identity
        )
        return status == 204