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    public static function attachEmailGroups($researchId, $groups)
    {
        $research = \Entity\Research::findOne($researchId);
        $type = \Entity\Research::findOneBy([ 'type' => $research->getType() ]);

        $research->setIdEmailGroups($groups);
        print_r($research);die();
        if ($research->save()) {
            return true;
        } else {
            throw new Exception(json_encode($research->getErrors()));
            return false;
        }
    }