SerializationServiceProvider.php

<?php

namespace Drupal\serialization;

use Drupal\Core\DependencyInjection\ContainerBuilder;
use Drupal\Core\DependencyInjection\ServiceProviderInterface;

/**
 * Serialization dependency injection container.
 */
class SerializationServiceProvider implements ServiceProviderInterface {
    
    /**
     * {@inheritdoc}
     */
    public function register(ContainerBuilder $container) {
        // Add a compiler pass for adding Normalizers and Encoders to Serializer.
        $container->addCompilerPass(new RegisterSerializationClassesCompilerPass());
        // Add a compiler pass for adding concrete Resolvers to chain Resolver.
        $container->addCompilerPass(new RegisterEntityResolversCompilerPass());
    }

}