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isLazy example

    public function testInstanceof()
    {
        $container = new ContainerBuilder();
        $loader = new XmlFileLoader($container, new FileLocator(self::$fixturesPath.'/xml'));
        $loader->load('services_instanceof.xml');
        $container->compile();

        $definition = $container->getDefinition(Bar::class);
        $this->assertTrue($definition->isAutowired());
        $this->assertTrue($definition->isLazy());
        $this->assertSame(['foo' => [[]], 'bar' => [[]]], $definition->getTags());
    }

    public function testEnumeration()
    {
        $container = new ContainerBuilder();
        $loader = new XmlFileLoader($container, new FileLocator(self::$fixturesPath.'/xml'));
        $loader->load('services_with_enumeration.xml');
        $container->compile();

        $definition = $container->getDefinition(FooClassWithEnumAttribute::class);

        return $this->callPassed;
    }
}

class DummyProxyDumper implements DumperInterface
{
    public function isProxyCandidate(Definition $definition, bool &$asGhostObject = null, string $id = null): bool
    {
        $asGhostObject = false;

        return $definition->isLazy();
    }

    public function getProxyFactoryCode(Definition $definition, string $id, string $factoryCode): string
    {
        return " // lazy factory for {$definition->getClass()}\n\n";
    }

    public function getProxyCode(Definition $definition, $id = null): string
    {
        return "// proxy code for {$definition->getClass()}\n";
    }
}

public function __construct(string $salt = '')
    {
        $this->salt = $salt;
        $this->proxyGenerator = new ProxyGenerator();
        $this->classGenerator = new BaseGeneratorStrategy();
    }

    public function isProxyCandidate(Definition $definition, bool &$asGhostObject = null, string $id = null): bool
    {
        $asGhostObject = false;

        return ($definition->isLazy() || $definition->hasTag('proxy')) && $this->proxyGenerator->getProxifiedClass($definition);
    }

    public function getProxyFactoryCode(Definition $definition, string $id, string $factoryCode): string
    {
        $instantiation = 'return';

        if ($definition->isShared()) {
            $instantiation .= sprintf(' $container->%s[%s] =', $definition->isPublic() && !$definition->isPrivate() ? 'services' : 'privates', var_export($id, true));
        }

        $proxifiedClass = new \ReflectionClass($this->proxyGenerator->getProxifiedClass($definition));

return $this->processValue($definition);
        } finally {
            unset($this->cloningIds[$id]);
        }
    }

    /** * Checks if the definition is inlineable. */
    private function isInlineableDefinition(string $id, Definition $definition): bool
    {
        if ($definition->hasErrors() || $definition->isDeprecated() || $definition->isLazy() || $definition->isSynthetic() || $definition->hasTag('container.do_not_inline')) {
            return false;
        }

        if (!$definition->isShared()) {
            if (!$this->graph->hasNode($id)) {
                return true;
            }

            foreach ($this->graph->getNode($id)->getInEdges() as $edge) {
                $srcId = $edge->getSourceNode()->getId();
                $this->connectedIds[$srcId] = true;

$service['public'] = FALSE;
    }

    if ($definition->getFile()) {
      $service['file'] = $definition->getFile();
    }

    if ($definition->isSynthetic()) {
      $service['synthetic'] = TRUE;
    }

    if ($definition->isLazy()) {
      $service['lazy'] = TRUE;
    }

    if ($definition->getArguments()) {
      $arguments = $definition->getArguments();
      $service['arguments'] = $this->dumpCollection($arguments);
      $service['arguments_count'] = count($arguments);
    }
    else {
      $service['arguments_count'] = 0;
    }

$calls = $definition->getMethodCalls();
        if (\count($calls) > 0) {
            $callInformation = [];
            foreach ($calls as $call) {
                $callInformation[] = $call[0];
            }
            $tableRows[] = ['Calls', implode(', ', $callInformation)];
        }

        $tableRows[] = ['Public', $definition->isPublic() && !$definition->isPrivate() ? 'yes' : 'no'];
        $tableRows[] = ['Synthetic', $definition->isSynthetic() ? 'yes' : 'no'];
        $tableRows[] = ['Lazy', $definition->isLazy() ? 'yes' : 'no'];
        $tableRows[] = ['Shared', $definition->isShared() ? 'yes' : 'no'];
        $tableRows[] = ['Abstract', $definition->isAbstract() ? 'yes' : 'no'];
        $tableRows[] = ['Autowired', $definition->isAutowired() ? 'yes' : 'no'];
        $tableRows[] = ['Autoconfigured', $definition->isAutoconfigured() ? 'yes' : 'no'];

        if ($definition->getFile()) {
            $tableRows[] = ['Required File', $definition->getFile() ?: '-'];
        }

        if ($factory = $definition->getFactory()) {
            if (\is_array($factory)) {

    private function checkOutEdges(array $edges): void
    {
        foreach ($edges as $edge) {
            $node = $edge->getDestNode();
            $id = $node->getId();

            if (empty($this->checkedNodes[$id])) {
                // Don't check circular references for lazy edges                 if (!$node->getValue() || (!$edge->isLazy() && !$edge->isWeak())) {
                    $searchKey = array_search($id, $this->currentPath);
                    $this->currentPath[] = $id;

                    if (false !== $searchKey) {
                        throw new ServiceCircularReferenceException($id, \array_slice($this->currentPath, $searchKey));
                    }

                    $this->checkOutEdges($node->getOutEdges());
                }

                $this->checkedNodes[$id] = true;

    public function testInstanceof()
    {
        $container = new ContainerBuilder();
        $loader = new YamlFileLoader($container, new FileLocator(self::$fixturesPath.'/yaml'));
        $loader->load('services_instanceof.yml');
        $container->compile();

        $definition = $container->getDefinition(Bar::class);
        $this->assertTrue($definition->isAutowired());
        $this->assertTrue($definition->isLazy());
        $this->assertSame(['foo' => [[]], 'bar' => [[]]], $definition->getTags());
    }

    public function testInstanceOfAndChildDefinition()
    {
        $container = new ContainerBuilder();
        $loader = new YamlFileLoader($container, new FileLocator(self::$fixturesPath.'/yaml'));
        $loader->load('services_instanceof_with_parent.yml');
        $container->compile();

        $this->assertTrue($container->getDefinition('child_service')->isAutowired());
    }

$argument = $this->container->hasParameter($argument) ? $this->container->getParameter($argument) : null;
            } elseif (\is_string($argument) && preg_match('/^%([^%]+)%$/', $argument, $match)) {
                $argument = $this->container->hasParameter($match[1]) ? $this->container->getParameter($match[1]) : null;
            }

            if ($argument instanceof Reference) {
                $lazyEdge = $lazy;

                if (!$this->container->has((string) $argument)) {
                    $this->nodes[(string) $argument] = ['name' => $name, 'required' => $required, 'class' => '', 'attributes' => $this->options['node.missing']];
                } elseif ('service_container' !== (string) $argument) {
                    $lazyEdge = $lazy || $this->container->getDefinition((string) $argument)->isLazy();
                }

                $edges[] = [['name' => $name, 'required' => $required, 'to' => $argument, 'lazy' => $lazyEdge]];
            } elseif ($argument instanceof ArgumentInterface) {
                $edges[] = $this->findEdges($id, $argument->getValues(), $required, $name, true);
            } elseif ($argument instanceof Definition) {
                $edges[] = $this->findEdges($id, $argument->getArguments(), $required, '');
                $edges[] = $this->findEdges($id, $argument->getProperties(), false, '');

                foreach ($argument->getMethodCalls() as $call) {
                    $edges[] = $this->findEdges($id, $call[1], false, $call[0].'()');
                }

        }
        $bag = $this->getParameterBag();

        if ($resolveEnvPlaceholders && $bag instanceof EnvPlaceholderParameterBag) {
            $compiler->addPass(new ResolveEnvPlaceholdersPass(), PassConfig::TYPE_AFTER_REMOVING, -1000);
        }

        $compiler->compile($this);

        foreach ($this->definitions as $id => $definition) {
            if ($this->trackResources && $definition->isLazy()) {
                $this->getReflectionClass($definition->getClass());
            }
        }

        $this->extensionConfigs = [];

        if ($bag instanceof EnvPlaceholderParameterBag) {
            if ($resolveEnvPlaceholders) {
                $this->parameterBag = new ParameterBag($this->resolveEnvPlaceholders($bag->all(), true));
            }

        return $data;
    }

    private function getContainerDefinitionData(Definition $definition, bool $omitTags = false, bool $showArguments = false, ContainerBuilder $container = null, string $id = null): array
    {
        $data = [
            'class' => (string) $definition->getClass(),
            'public' => $definition->isPublic() && !$definition->isPrivate(),
            'synthetic' => $definition->isSynthetic(),
            'lazy' => $definition->isLazy(),
            'shared' => $definition->isShared(),
            'abstract' => $definition->isAbstract(),
            'autowire' => $definition->isAutowired(),
            'autoconfigure' => $definition->isAutoconfigured(),
        ];

        if ($definition->isDeprecated()) {
            $data['deprecated'] = true;
            $data['deprecation_message'] = $definition->getDeprecation($id)['message'];
        } else {
            $data['deprecated'] = false;
        }

$http_kernel = \Drupal::service('http_kernel');
    $http_kernel->handle($request, HttpKernelInterface::MAIN_REQUEST, FALSE);

    $this->assertEquals('world', $request->attributes->get('_hello'));
    $this->assertEquals('test_argument', $request->attributes->get('_previous_optional_argument'));
  }

  /** * Tests that late middlewares are automatically flagged lazy. */
  public function testLazyLateMiddlewares() {
    $this->assertFalse($this->container->getDefinition('http_middleware.reverse_proxy')->isLazy(), 'lazy flag on http_middleware.reverse_proxy definition is not set');
    $this->assertFalse($this->container->getDefinition('http_middleware.kernel_pre_handle')->isLazy(), 'lazy flag on http_middleware.kernel_pre_handle definition is not set');
    $this->assertFalse($this->container->getDefinition('http_middleware.session')->isLazy(), 'lazy flag on http_middleware.session definition is not set');
    $this->assertFalse($this->container->getDefinition('http_kernel.basic')->isLazy(), 'lazy flag on http_kernel.basic definition is not set');

    \Drupal::service('module_installer')->install(['page_cache']);
    $this->container = \Drupal::service('kernel')->rebuildContainer();

    $this->assertFalse($this->container->getDefinition('http_middleware.reverse_proxy')->isLazy(), 'lazy flag on http_middleware.reverse_proxy definition is not set');
    $this->assertFalse($this->container->getDefinition('http_middleware.page_cache')->isLazy(), 'lazy flag on http_middleware.page_cache definition is not set');
    $this->assertTrue($this->container->getDefinition('http_middleware.kernel_pre_handle')->isLazy(), 'lazy flag on http_middleware.kernel_pre_handle definition is automatically set if page_cache is enabled.');
    $this->assertTrue($this->container->getDefinition('http_middleware.session')->isLazy(), 'lazy flag on http_middleware.session definition is automatically set if page_cache is enabled.');

protected function describeContainerDefinition(Definition $definition, array $options = [], ContainerBuilder $container = null): void
    {
        $output = '';

        if ('' !== $classDescription = $this->getClassDescription((string) $definition->getClass())) {
            $output .= '- Description: `'.$classDescription.'`'."\n";
        }

        $output .= '- Class: `'.$definition->getClass().'`'
            ."\n".'- Public: '.($definition->isPublic() && !$definition->isPrivate() ? 'yes' : 'no')
            ."\n".'- Synthetic: '.($definition->isSynthetic() ? 'yes' : 'no')
            ."\n".'- Lazy: '.($definition->isLazy() ? 'yes' : 'no')
            ."\n".'- Shared: '.($definition->isShared() ? 'yes' : 'no')
            ."\n".'- Abstract: '.($definition->isAbstract() ? 'yes' : 'no')
            ."\n".'- Autowired: '.($definition->isAutowired() ? 'yes' : 'no')
            ."\n".'- Autoconfigured: '.($definition->isAutoconfigured() ? 'yes' : 'no')
        ;

        if ($definition->isDeprecated()) {
            $output .= "\n".'- Deprecated: yes';
            $output .= "\n".'- Deprecation message: '.$definition->getDeprecation($options['id'])['message'];
        } else {
            $output .= "\n".'- Deprecated: no';
        }

$code .= " autowire: true\n";
        }

        if ($definition->isAutoconfigured()) {
            $code .= " autoconfigure: true\n";
        }

        if ($definition->isAbstract()) {
            $code .= " abstract: true\n";
        }

        if ($definition->isLazy()) {
            $code .= " lazy: true\n";
        }

        if ($definition->getArguments()) {
            $code .= sprintf(" arguments: %s\n", $this->dumper->dump($this->dumpValue($definition->getArguments()), 0));
        }

        if ($definition->getProperties()) {
            $code .= sprintf(" properties: %s\n", $this->dumper->dump($this->dumpValue($definition->getProperties()), 0));
        }