<?phpnamespace Bluesquare\StorageBundle;use Bluesquare\StorageBundle\DependencyInjection\StorageExtension;use Symfony\Component\DependencyInjection\ContainerBuilder;use Symfony\Component\HttpKernel\Bundle\Bundle;class StorageBundle extends Bundle{ public function build(ContainerBuilder $container) { parent::build($container); } public function getContainerExtension() { if (null === $this->extension) $this->extension = new StorageExtension(); return $this->extension; }}