synthetic example

return function DContainerConfigurator $container) {
    $container->parameters()
        ->set('unit_enum', FooUnitEnum::BAR)
        ->set('enum_array', [FooUnitEnum::BAR, FooUnitEnum::FOO]);

    $services = $container->services();

    $services->defaults()->public();

    $services->set('service_container', ContainerInterface::class)
        ->synthetic();

    $services->set(FooClassWithEnumAttribute::class)
        ->args([FooUnitEnum::BAR]);
};

->call('setBar', [service('inlined')]);

    $s->set('inlined', 'Bar')
        ->property('pub', 'pub')
        ->call('setBaz', [service('baz')])
        ->private();

    $s->set('baz', 'Baz')
        ->call('setFoo', [service('foo_with_inline')]);

    $s->set('request', 'Request')
        ->synthetic();

    $s->set('configurator_service', 'ConfClass')
        ->private()
        ->call('setFoo', [service('baz')]);

    $s->set('configured_service', 'stdClass')
        ->configurator([service('configurator_service'), 'configureStdClass']);

    $s->set('configurator_service_simple', 'ConfClass')
        ->args(['bar'])
        ->private();

    

param('kernel.debug'),
                sprintf('%s/%sDeprecations.log', param('kernel.build_dir'), param('kernel.container_class')),
            ])
            ->tag('container.no_preload')

        ->set('cache_clearer', ChainCacheClearer::class)
            ->args([
                tagged_iterator('kernel.cache_clearer'),
            ])

        ->set('kernel')
            ->synthetic()
            ->public()
        ->alias(KernelInterface::class, 'kernel')

        ->set('filesystem', Filesystem::class)
        ->alias(Filesystem::class, 'filesystem')

        ->set('file_locator', FileLocator::class)
            ->args([
                service('kernel'),
            ])
        ->alias(FileLocator::class, 'file_locator')