public function fieldFilterValueContacts($object)
{
    $contacts = $object->liste_contact(-1, 'external');

    return array_map(function($c) {
        return [
            'id' => $c['id'],
            'name' => $c['firstname'] . ' ' . $c['lastname'],
            'email' => $c['email'],
            'phone' => $c['phone']
        ];
    }, $contacts);
}