Use paramConverter of SensioFrameworkExtraBundle in breadcrumb title

In our projects, we use a lot the paramConverter of SensioFrameworkExtraBundle and so the following syntax:

    /**
     *
     * @Route("/{slug}", name="customer_show")
     * @Method("GET")
     *
     * @Breadcrumb("Client", route="customer_index")
     */
    public function showAction(Customer $customer)
    {
        $this->get("apy_breadcrumb_trail")->add($customer->__toString());

        return array('entity' => $customer);
    }

To show the following breadcrumb :
Client -> Floran

I modify the bundle to use this new syntax :

    /**
     *
     * @Route("/{slug}", name="customer_show")
     * @Method("GET")
     *
     * @Breadcrumb("Client", route="customer_index")
     * @Breadcrumb("{customer}")
     */
    public function showAction(Customer $customer)
    {
        return array('entity' => $customer);
    }

What do you think of this change?