private function listUserAuthorizedSubdefs(User $user)
    {
        $acl = $this->getAclForUser($user);
        $ret = [];

        foreach ($acl->get_granted_sbas() as $databox) {
            $databoxId = $databox->get_sbas_id();
            $subdefs = $databox->get_subdef_structure();
            foreach ($subdefs as $subGroup) {
                foreach ($subGroup->getIterator() as $sub) {
                    $opt = [];
                    $data = [
                      'name'             => $sub->get_name(),
                      'databox_id'       => $databoxId,
                      'class'            => $sub->get_class(),
                      'preset'           => $sub->get_preset(),
                      'downloadable'     => $sub->isDownloadable(),
                      'devices'          => $sub->getDevices(),
                      'labels'           => [
                        'fr' => $sub->get_label('fr'),
                        'en' => $sub->get_label('en'),
                        'de' => $sub->get_label('de'),
                        'nl' => $sub->get_label('nl'),
                      ],
                    ];
                    $options = $sub->getOptions();
                    foreach ($options as $option) {
                        $opt[$option->getName()] = $option->getValue();
                    }
                    $data['options'] = $opt;
                    $ret[$subGroup->getName()][$sub->get_name()] = $data;
                }
            }
        }

        return $ret;
    }