ProxyServicesPass::process

public ProxyServicesPass::process(ContainerBuilder $container)

public function process(ContainerBuilder $container) {
  foreach ($container->getDefinitions() as $service_id => $definition) {
    if ($definition->isLazy()) {
      $proxy_class = ProxyBuilder::buildProxyClassName($definition->getClass());
      if (class_exists($proxy_class)) {
        // Copy the existing definition to a new entry.
        $definition->setLazy(FALSE);
        // Ensure that the service is accessible.
        $definition->setPublic(TRUE);
        $new_service_id = 'drupal.proxy_original_service.' . $service_id;
        $container->setDefinition($new_service_id, $definition);

        $container->register($service_id, $proxy_class)
          ->setArguments([new Reference('service_container'), $new_service_id]);
      }
      else {
        $class_name = $definition->getClass();

        // Find the root namespace.
        $match = [];
        preg_match('/([a-zA-Z0-9_]+\\\\[a-zA-Z0-9_]+)\\\\(.+)/', $class_name, $match);
        $root_namespace = $match[1];

        // Find the root namespace path.
        $root_namespace_dir = '[namespace_root_path]';

        $namespaces = $container->getParameter('container.namespaces');

        // Hardcode Drupal Core, because it is not registered.
        $namespaces['Drupal\Core'] = 'core/lib/Drupal/Core';

        if (isset($namespaces[$root_namespace])) {
          $root_namespace_dir = $namespaces[$root_namespace];
        }

        $message = <<<EOF

Missing proxy class '$proxy_class' for lazy service '$service_id'.
Use the following command to generate the proxy class:
  php core/scripts/generate-proxy-class.php '$class_name' "$root_namespace_dir"


EOF;
        trigger_error($message, E_USER_WARNING);
      }
    }
  }
}