public function configureMultisite(ContainerBuilder $container, array $config)
    {
        $multisite = $config['multisite'];

        if ('host' === $multisite) {
            $container->setAlias('sonata.page.site.selector', 'sonata.page.site.selector.host');

            $container->removeDefinition('sonata.page.site.selector.host_by_locale');
            $container->removeDefinition('sonata.page.site.selector.host_with_path');
            $container->removeDefinition('sonata.page.site.selector.host_with_path_by_locale');
        } elseif ('host_by_locale' === $multisite) {
            $container->setAlias('sonata.page.site.selector', 'sonata.page.site.selector.host_by_locale');

            $container->removeDefinition('sonata.page.site.selector.host');
            $container->removeDefinition('sonata.page.site.selector.host_with_path');
            $container->removeDefinition('sonata.page.site.selector.host_with_path_by_locale');
        } else {
            /*
             * The multipath option required a specific router and RequestContext
             */
            $container->setAlias('router.request_context', 'sonata.page.router.request_context');

            if ('host_with_path' === $multisite) {
                $container->setAlias('sonata.page.site.selector', 'sonata.page.site.selector.host_with_path');

                $container->removeDefinition('sonata.page.site.selector.host_with_path_by_locale');
                $container->removeDefinition('sonata.page.site.selector.host');
                $container->removeDefinition('sonata.page.site.selector.host_by_locale');
            } elseif ('host_with_path_by_locale' === $multisite) {
                $container->setAlias('sonata.page.site.selector', 'sonata.page.site.selector.host_with_path_by_locale');

                $container->removeDefinition('sonata.page.site.selector.host_with_path');
                $container->removeDefinition('sonata.page.site.selector.host');
                $container->removeDefinition('sonata.page.site.selector.host_by_locale');
            }
        }

        if ($container->hasAlias('sonata.page.site.selector')) {
            $container->getAlias('sonata.page.site.selector')->setPublic(true);
        }
    }