core-bundle/src/Routing/Matcher/PublishedFilter.php
public function filter(RouteCollection $collection, Request $request): RouteCollection
    {
        if ($this->tokenChecker->hasBackendUser() && $this->tokenChecker->isPreviewMode()) {
            return $collection;
        }

        foreach ($collection->all() as $name => $route) {
            /** @var PageModel $pageModel */
            $pageModel = $route->getDefault('pageModel');

            if (!$pageModel instanceof PageModel || $pageModel->rootIsPublic) {
                continue;
            }

            $collection->remove($name);
        }

        return $collection;
    }
public function filter(RouteCollection $collection, Request $request): RouteCollection
    {
        if ($this->tokenChecker->hasBackendUser() && $this->tokenChecker->isPreviewMode()) {
            return $collection;
        }

        foreach ($collection->all() as $name => $route) {
            /** @var PageModel $pageModel */
            $pageModel = $route->getDefault('pageModel');

            if (!$pageModel instanceof PageModel || $pageModel->rootIsPublic) {
                continue;
            }

            $collection->remove($name);
        }

        return $collection;
    }
{@inheritdoc}