code: public function load(array $configs, ContainerBuilder $container)
      {
          $refl = new \ReflectionClass($this); // Supports for class extending this one
          $loader = new ServiceLoader($container);
          $serviceFolderPath = \dirname($refl->getFileName(), 2).'/Resources/config/services';
          $loader->loadFiles($serviceFolderPath);
      }
docs: {@inheritdoc}
  
  @throws \Exception