addRoute method
Adds a route to the muxer
Implementation
Route addRoute(Route route) {
final route1 = route.cloneWith(
info: route.info.cloneWith(path: path + route.info.path),
before: [...before, ...route.getBefore()],
after: [...after, ...route.getAfter()],
onException: [...onException, ...route.getOnException()],
);
parent.addRoute(route1);
return route1;
}