TranslatorPass example

        $container = $this->createContainer($data);
        $container->registerExtension($extension ?: new FrameworkExtension());
        $this->loadFromFile($container, $file);

        if ($resetCompilerPasses) {
            $container->getCompilerPassConfig()->setOptimizationPasses([]);
            $container->getCompilerPassConfig()->setRemovingPasses([]);
            $container->getCompilerPassConfig()->setAfterRemovingPasses([]);
        }
        $container->getCompilerPassConfig()->setBeforeOptimizationPasses([new LoggerPass()]);
        $container->getCompilerPassConfig()->setBeforeRemovingPasses([new AddConstraintValidatorsPass(), new TranslatorPass()]);
        $container->getCompilerPassConfig()->setAfterRemovingPasses([new AddAnnotationsCachedReaderPass()]);

        if (!$compile) {
            return $container;
        }
        $container->compile();

        return self::$containerCache[$cacheKey] = $container;
    }

    protected function createContainerFromClosure($closure, $data = [])
    {

$reader = new Definition();

        $translator = (new Definition())
            ->setArguments([null, null, null, null]);

        $container = new ContainerBuilder();
        $container->setDefinition('translator.default', $translator);
        $container->setDefinition('translation.reader', $reader);
        $container->setDefinition('translation.xliff_loader', $loader);

        $pass = new TranslatorPass();
        $pass->process($container);

        $expectedReader = (new Definition())
            ->addMethodCall('addLoader', ['xliff', new Reference('translation.xliff_loader')])
            ->addMethodCall('addLoader', ['xlf', new Reference('translation.xliff_loader')])
        ;
        $this->assertEquals($expectedReader, $reader);

        $expectedLoader = (new Definition())
            ->addTag('translation.loader', ['alias' => 'xliff', 'legacy-alias' => 'xlf'])
        ;