reflection.php

<?php
$items = $em->getRepository('AppBundle:ExampleEntity')->findAll();
foreach($items as $i){
    $c = new \ReflectionClass("AppBundle\\Entity\\ExampleEntity");
    $prop = $c->getProperty('visible_label');
    $prop->setAccessible(true);
    $i->translate('en')->setVisibleLabel($prop->getValue($i));
    $i->mergeNewTranslations();
}