protected function getGroupAndSortingDefinition()
    {
        /** @var Contao2BackendViewDefinitionInterface $view */
        $view = $this->getEnvironment()
            ->getDataDefinition()
            ->getDefinition(Contao2BackendViewDefinitionInterface::NAME);

        return $view
            ->getListingConfig()
            ->getGroupAndSortingDefinition();
    }