/**
     * @param int $id
     * @param EntityManagerInterface $entityManager
     * @param SerializerInterface $serializer
     * @return JsonResponse
     * @Route("/project/{id}", name="project_show")
     */
    public function projectShow(int $id, EntityManagerInterface $entityManager, SerializerInterface $serializer) {
        $project = $entityManager->getRepository('App:Project')->findOneBy([
            'id' => $id
        ]);

        return new JsonResponse($serializer->serialize($project, 'json'));
    }

$locale = $this->get('request')->getLocale();

$product = new Product();
$product->setCurrentLocale($locale);

    /**
     * Gets the 'prezent_doctrine_translatable.listener' service.
     *
     * This service is shared.
     * This method always returns the same instance of the service.
     *
     * @return \Prezent\Doctrine\Translatable\EventListener\TranslatableListener A Prezent\Doctrine\Translatable\EventListener\TranslatableListener instance.
     */
    protected function getPrezentDoctrineTranslatable_ListenerService()
    {
        $this->services['prezent_doctrine_translatable.listener'] = $instance = new \Prezent\Doctrine\Translatable\EventListener\TranslatableListener($this->get('prezent_doctrine_translatable.metadata_factory'));

        $instance->setCurrentLocale('en');
        $instance->setFallbackLocale('en');

        return $instance;
    }

    /**
     * Gets the 'prezent_doctrine_translatable.listener.locale' service.
     *
     * This service is shared.
     * This method always returns the same instance of the service.
     *
     * @return \Prezent\Doctrine\TranslatableBundle\EventListener\LocaleListener A Prezent\Doctrine\TranslatableBundle\EventListener\LocaleListener instance.
     */
    protected function getPrezentDoctrineTranslatable_Listener_LocaleService()
    {
        return $this->services['prezent_doctrine_translatable.listener.locale'] = new \Prezent\Doctrine\TranslatableBundle\EventListener\LocaleListener($this->get('prezent_doctrine_translatable.listener'));
    }

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
use Prezent\Doctrine\Translatable\Annotation as Prezent;
use Prezent\Doctrine\Translatable\Entity\AbstractTranslatable;
use AppBundle\Entity\ProductTranslation;

/**
 * @ORM\Entity
 */
class Product extends AbstractTranslatable
{

    /**
     * @ORM\Column(type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * @Prezent\Translations(targetEntity="AppBundle\Entity\ProductTranslation")
     */
    protected $translations;

    /**
     * @Prezent\CurrentLocale
     */
    private $currentLocale;

    private $currentTranslation;

    public function __construct()
    {
        $this->translations = new ArrayCollection();
    }

    /**
     * Get id
     *
     * @return integer 
     */
    public function getId()
    {
        return $this->id;
    }

    public function setCurrentLocale($locale)
    {
        $this->currentLocale = $locale;

        return $this;
    }

    public function getCurrentLocale()
    {
        return $this->currentLocale;
    }

    /**
     * Translation helper method
     */
    public function translate($locale = null)
    {
        if (null === $locale) {
            $locale = $this->currentLocale;
        }

        if (!$locale) {
            throw new \RuntimeException('No locale has been set and currentLocale is empty');
        }

        if ($this->currentTranslation && $this->currentTranslation->getLocale() === $locale) {
            return $this->currentTranslation;
        }

        if (!$translation = $this->translations->get($locale)) {
            $translation = new ProductTranslation();
            $translation->setLocale($locale);
            $this->addTranslation($translation);
        }

        $this->currentTranslation = $translation;
        return $translation;
    }

    /**
     * Set name
     *
     * @param string $name
     */
    public function setName($name)
    {
        $this->translate()->setName($name);
    }

    /**
     * Get name
     *
     * @return string 
     */
    public function getName()
    {
        return $this->translate()->getName();
    }

    /**
     * Set color
     *
     * @param string $color
     */
    public function setColor($color)
    {
        $this->translate()->setColor($color);
    }

    /**
     * Get color
     *
     * @return string 
     */
    public function getColor()
    {
        return $this->translate()->getColor();
    }

}

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Prezent\Doctrine\Translatable\Annotation as Prezent;
use Prezent\Doctrine\Translatable\Entity\AbstractTranslation;

/**
 * @ORM\Entity
 */
class ProductTranslation extends AbstractTranslation
{

    /**
     * @Prezent\Translatable(targetEntity="AppBundle\Entity\Product")
     */
    protected $translatable;

    /**
     * @ORM\Column(type="string", length=100)
     */
    private $name;

    /**
     * @ORM\Column(type="string", length=100)
     */
    private $color;

    /**
     * Set name
     *
     * @param string $name
     * @return ProductTranslation
     */
    public function setName($name)
    {
        $this->name = $name;

        return $this;
    }

    /**
     * Get name
     *
     * @return string 
     */
    public function getName()
    {
        return $this->name;
    }

    /**
     * Set color
     *
     * @param string $color
     * @return ProductTranslation
     */
    public function setColor($color)
    {
        $this->color = $color;

        return $this;
    }

    /**
     * Get color
     *
     * @return string 
     */
    public function getColor()
    {
        return $this->color;
    }

}

FatalThrowableError

Type error: Argument 1 passed to Prezent\Doctrine\TranslatableBundle\EventListener\LocaleListener::onKernelRequest() must be an instance of Symfony\Component\HttpKernel\RequestEvent, instance of Symfony\Component\HttpKernel\Event\GetResponseEvent given, called in ... Symfony/Component/EventDispatcher/Debug/WrappedListener.php on line 115

- Installation request for prezent/doctrine-translatable-bundle 1.0.*@dev -> satisfiable by prezent/doctrine-translatable-bundle[1.0.x-dev].
- prezent/doctrine-translatable-bundle 1.0.x-dev requires prezent/doctrine-translatable >=1.0,<2.0-dev -> no matching package found.

PHP Fatal error:  Class 'Prezent\Doctrine\Translatable\Mapping\Driver\YamlDriver' not found in /Users/comur/Documents/workspace/wid.localhost.net/app/cache/dev/appDevDebugProjectContainer.php on line 517

In PrezentDoctrineTranslatableExtension.php line 45:
                                                             
  [Symfony\Component\Debug\Exception\ContextErrorException]  
  Notice: Undefined variable: container