PHP DI + Trait + Symfony service === <3 ?

ConnectedUser.php

<?php

namespace Tentacode\App\Security;

trait ConnectedUser
{
    /**
     * @Inject
     * @var Symfony\Component\Security\Core\SecurityContext
     */
    private $securityContext;

    public function getConnectedUser()
    {
        $token = $this->securityContext->getToken();
        if (!$token) {
            throw new \RuntimeException('No user is connected.');
        }

        return $token->getUser();
    }
}

phpdi_config.php

<?php

return [
    'Symfony\Component\Security\Core\SecurityContext' => DI\link('security.context'),
    // ...
];

ProfileController.php

<?php

namespace Tentacode\App\Controller\Person;

use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Tentacode\App\Security\ConnectedUser;
use Tentacode\App\Templating\Templating;
use Tentacode\Domain\Person\PersonRepository;
use Tentacode\Domain\User;

class ProfileController
{
    use ConnectedUser;

    protected $templating;
    protected $personRepository;

    public function __construct(Templating $templating, PersonRepository $personRepository)
    {
        $this->templating = $templating;
        $this->personRepository = $personRepository;
    }

    public function myProfileAction()
    {
        $user = $this->getConnectedUser();

        return $this->templating->render('TentacodeAppBundle:Person:profile.html.twig', [
            'user' => $user
        ]);
    }
}

yeah, that's what I'll be doing in practice, @Inject on properties, and utility services