router.put('/external/:domain/:externalId/remove', function (req, res) {
    var username = req.headers['x-gleaner-user'];
    restUtils.processResponse(classes.isAuthorizedForExternal(req.params.domain, req.params.externalId, username, 'put', '/classes/external/:domain/:externalId/remove')
        .then(function (classReq) {
            return classes.modifyClass(classReq._id, username, req.body, false);