/** * Evaluate the contao 2 sorting flag into grouping length. * * @param ListingConfigInterface|PropertyInterface $config The property to evaluate the flag for. * * @param int $flag The flag to be evaluated. * * @return void */ protected function evalFlagGroupingLength($config, $flag) { if ($flag == 1 || $flag == 2) { $config->setGroupingLength(1); } elseif ($flag == 3 || $flag == 4) { $config->setGroupingLength(2); } }