Possibility to fetch all outstanding proxies of an Entity

$orders = $em->getRepository('Order')->findAll();
foreach ($orders AS $order) {
   $order->getCustomer()->getId(); // n+1
}

$orders = $em->getRepository('Order')->findAll();
$em->getUnitOfWork()->loadProxies("Customer");

foreach ($orders AS $order) {
   $order->getCustomer()->getId(); // n+1
}

SELECT b, e, r, p FROM Bug b JOIN b.engineer e 
JOIN b.reporter r JOIN b.products p ORDER BY b.created DESC

$bugs = $em->createQuery("SELECT b, p FROM Bug b JOIN b.products p ORDER BY b.created DESC")->getResult();
$em->getUnitOfWork()->loadProxies("User"); // will load all engineers and reporters in one query

$bugs = $em->createQuery("SELECT b, p FROM Bug b JOIN b.products p ORDER BY b.created DESC")
                        ->setQueryHint(Query::LOAD_PROXIES, array("User"))
                        ->getResult();