getKnownTags example

$pass->process($container);

        $this->assertSame([sprintf('%s: Tag "kenrel.event_subscriber" was defined on service(s) "foo", "bar", but was never used. Did you mean "kernel.event_subscriber"?', UnusedTagsPass::class)], $container->getCompiler()->getLog());
    }

    public function testMissingKnownTags()
    {
        if (\dirname((new \ReflectionClass(ContainerBuilder::class))->getFileName(), 3) !== \dirname(__DIR__, 5)) {
            $this->markTestSkipped('Tests are not run from the root symfony/symfony metapackage.');
        }

        $this->assertSame(UnusedTagsPassUtils::getDefinedTags(), $this->getKnownTags(), 'The src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/UnusedTagsPass.php file must be updated; run src/Symfony/Bundle/FrameworkBundle/Resources/bin/check-unused-known-tags.php.');
    }

    private function getKnownTags(): array
    {
        $tags = \Closure::bind(
            fn () => UnusedTagsPass::KNOWN_TAGS,
            null,
            UnusedTagsPass::class
        D();
        sort($tags);