class ConfigTranslationListController

class ConfigTranslationListController extends ControllerBase {
    
    /**
     * The mapper manager.
     *
     * @var \Drupal\config_translation\ConfigMapperManagerInterface
     */
    protected $mapperManager;
    
    /**
     * Constructs a new ConfigTranslationListController object.
     *
     * @param \Drupal\config_translation\ConfigMapperManagerInterface $mapper_manager
     *   The config mapper manager.
     */
    public function __construct(ConfigMapperManagerInterface $mapper_manager) {
        $this->mapperManager = $mapper_manager;
    }
    
    /**
     * Provides the listing page for any entity type.
     *
     * @param string $mapper_id
     *   The name of the mapper.
     *
     * @return array
     *   A render array as expected by
     *   \Drupal\Core\Render\RendererInterface::render().
     *
     * @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException
     *   Throws an exception if a mapper plugin could not be instantiated from the
     *   mapper definition in the constructor.
     */
    public function listing($mapper_id) {
        $mapper_definition = $this->mapperManager
            ->getDefinition($mapper_id);
        $mapper = $this->mapperManager
            ->createInstance($mapper_id, $mapper_definition);
        if (!$mapper) {
            throw new NotFoundHttpException();
        }
        $entity_type = $mapper->getType();
        // If the mapper, for example the mapper for fields, has a custom list
        // controller defined, use it. Other mappers, for examples the ones for
        // node_type and block, fallback to the generic configuration translation
        // list controller.
        $build = $this->entityTypeManager()
            ->getHandler($entity_type, 'config_translation_list')
            ->setMapperDefinition($mapper_definition)
            ->render();
        $build['#title'] = $mapper->getTypeLabel();
        return $build;
    }

}