NormalInstallerServiceProvider.php

<?php

namespace Drupal\Core\Installer;

use Drupal\Core\DependencyInjection\ContainerBuilder;
use Drupal\Core\DependencyInjection\ServiceProviderInterface;

/**
 * Service provider for the non early installer environment.
 */
class NormalInstallerServiceProvider implements ServiceProviderInterface {
    
    /**
     * {@inheritdoc}
     */
    public function register(ContainerBuilder $container) {
        // Use performance-optimized extension lists.
        $container->getDefinition('extension.list.module')
            ->setClass('Drupal\\Core\\Installer\\InstallerModuleExtensionList');
        $container->getDefinition('extension.list.theme')
            ->setClass('Drupal\\Core\\Installer\\InstallerThemeExtensionList');
        $container->getDefinition('extension.list.theme_engine')
            ->setClass('Drupal\\Core\\Installer\\InstallerThemeEngineExtensionList');
    }

}