public function indexAction ()
    {
        $layoutGroups = array_map(
            function ($elementType)
            {
                return [
                    "title"       => ucfirst($elementType) . "s",
                    "elementType" => $elementType,
                    "elements"    => $this->elementTypesModel->getListedElements($elementType),
                ];
            },
            $this->elementTypesModel->getAllElementTypes()
        );


        return $this->twig->render("@core/index.twig", [
            "layoutGroups" => $layoutGroups,
            "downloads"    => $this->downloadModel->getAllDownloads(),
        ]);
    }