private function generateConfigCache($cacheDir)
{
$dumper = new CombinedFileDumper($this->filesystem, new PhpFileLoader(), $cacheDir . '/contao', true);
$dumper->dump($this->locator->locate('config/autoload.php', null, false), 'config/autoload.php');
$dumper->dump($this->locator->locate('config/config.php', null, false), 'config/config.php');
}