/**
  * Gets the 'twig.extension' service.
  *
  * This service is shared.
  * This method always returns the same instance of the service.
  *
  * @return \Drupal\Core\Template\TwigExtension A Drupal\Core\Template\TwigExtension instance.
  */
 protected function getTwig_ExtensionService()
 {
     $this->services['twig.extension'] = $instance = new \Drupal\Core\Template\TwigExtension($this->get('renderer'));
     $instance->setUrlGenerator($this->get('url_generator'));
     $instance->setThemeManager($this->get('theme.manager'));
     $instance->_serviceId = 'twig.extension';
     return $instance;
 }