* @see \Drupal\Core\DrupalKernel
* @see \Drupal\Core\CoreServiceProvider
*/
- public function __construct($root, array $module_list = [], CacheBackendInterface $cache_backend) {
+ public function __construct($root, array $module_list, CacheBackendInterface $cache_backend) {
$this->root = $root;
$this->moduleList = [];
foreach ($module_list as $name => $module) {