Multiple optional params with restify-router

Hi, I have a problem with restify and restify-router. I have this route, which works correctly with express. I recently switched to restify and can't find a way to make it work.

const Router = require('restify-router').Router;
const router = new  Router();
const restify = require('restify');
const app = restify.createServer();
app.use(restify.plugins.queryParser());
app.use(restify.plugins.bodyParser({ mapParams: false }));
router.add('/:father_model/:father_id?/:child1_model?/:child1_id?/:child2_model?/:child2_id?/:child3_model?/:child3_id?/:child4_model?/:child4_id?', CrudRouter);
router.applyRoutes(app);

Start by reproducing the route in the shown restify and restify-router setup, then compare its behavior with Express. Trace the route declaration and the CrudRouter entry point; done means the optional-parameter behavior is explained and a supported resolution or limitation is established.