Your project should use return types

More information: https://insight.symfony.com/what-we-analyse/php.missing_return_typehint

in src/Container/Events/ListenerProvider.php, line 20 
  1.  */
  2. final class ListenerProvider implements ContainerAware, ListenerProviderInterface
  3. {
  4.     use HasContainer;
  6.     public function getListenersForEvent(object $event): iterable
    Method Projek\Container\Events\ListenerProvider::getListenersForEvent() return type has no value type specified in iterable type iterable.
    Time to fix: about 9 minutes
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                                    Last edited  by Fery Wardiyanto
                    
  7.     {
  8.         $listeners = [
  9.             BeforeRegistration::class => ['beforeRegistration'],
  10.             AfterRegistration::class => ['afterRegistration'],
  11.             BeforeResolution::class => ['beforeResolution'],

Your project should not contain commented code

More information: https://insight.symfony.com/what-we-analyse/php.commented_out_code

in src/Container.php, line 58 
  1.             self::class => $this,
  2.             ContainerInterface::class => $this,
  3.         ]);
  5.         // if ($eventDispatcher) {
  6.         //     $entries[EventDispatcherInterface::class] = $eventDispatcher;
    Commented out code reduces readability and lowers the code confidence for other developers. If it's common usage for debug, it should not be committed. Using a version control system, such code can be safely removed.
    Time to fix: about 30 minutes
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                                    Last edited  by Fery Wardiyanto
                    
  7.         // }
  9.         foreach ($entries as $id => $factory) {
  10.             $this->set($id, $factory);
  11.         }