core-bundle/src/ContaoManager/Plugin.php
public function getRouteCollection(LoaderResolverInterface $resolver, KernelInterface $kernel): ?RouteCollection
    {
        return $resolver
            ->resolve(__DIR__.'/../Resources/config/routing.yml')
            ->load(__DIR__.'/../Resources/config/routing.yml')
        ;
    }
public function getRouteCollection(LoaderResolverInterface $resolver, KernelInterface $kernel): ?RouteCollection
    {
        return $resolver
            ->resolve(__DIR__.'/../Resources/config/routing.yml')
            ->load(__DIR__.'/../Resources/config/routing.yml')
        ;
    }
{@inheritdoc}