Rebuilds the route information and dumps it.
Rebuilding the route information is the process of gathering all routing data from .routing.yml files, creating a \Symfony\Component\Routing\RouteCollection object out of it, and dispatching that object as a \Drupal\Core\Routing\RouteBuildEvent to all registered listeners. After that, the \Symfony\Component\Routing\RouteCollection object is used to dump the data. Examples of a dump include filling up the routing table, auto-generating Apache mod_rewr