Container.php

<?php

namespace Drupal\Core\DependencyInjection;

use Drupal\Component\DependencyInjection\Container as DrupalContainer;

/**
 * Extends the Drupal container to set the service ID on the created object.
 */
class Container extends DrupalContainer {
    
    /**
     * {@inheritdoc}
     */
    public function set($id, $service) {
        parent::set($id, $service);
        // Ensure that the _serviceId property is set on synthetic services as well.
        if (isset($this->services[$id]) && is_object($this->services[$id]) && !isset($this->services[$id]->_serviceId)) {
            $this->services[$id]->_serviceId = $id;
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function __sleep() {
        assert(FALSE, 'The container was serialized.');
        return array_keys(get_object_vars($this));
    }

}