Show all softdeleteable entities class name (not for annotation config)

SoftDeleteableEnabledCommand.php

<?php

namespace AppBundle\Command;

use Doctrine\Bundle\DoctrineBundle\Command\Proxy\DoctrineCommandHelper;
use Gedmo\Mapping\ExtensionMetadataFactory;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;

/**
 * SoftDeleteableShowCommand
 */
class SoftDeleteableEnabledCommand extends Command
{
    protected function configure()
    {
        $this
            ->setName('app:softdeleteable:enabled')
            ->setDescription('Show all softdeleteable enabled entities')
            ->addOption('em', null, InputOption::VALUE_OPTIONAL, 'The entity manager to use for this command');
        ;
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        DoctrineCommandHelper::setApplicationEntityManager($this->getApplication(), $input->getOption('em'));

        $entityManager = $this->getHelper('em')->getEntityManager();

        $entityClassNames = $entityManager->getConfiguration()
            ->getMetadataDriverImpl()
            ->getAllClassNames()
        ;

        $extensionMetadataFactory = new ExtensionMetadataFactory(
            $entityManager,
            'Gedmo\SoftDeleteable',
            new \Doctrine\Common\Annotations\AnnotationReader()
        );

        foreach ($entityClassNames as $entityClassName) {
            $classMetadata = $entityManager->getClassMetadata($entityClassName);
            $config = $extensionMetadataFactory->getExtensionMetadata($classMetadata);

            if ($config && $config['softDeleteable']) {
                $output->writeLn(sprintf('enable for <info>%s</info>', $entityClassName));
            }
        }
    }
}

I use a yaml config mapping. For annotation config just configure the Doctrine AnnotationReader