Jarves\Admin\ObjectCrud::getNestedSelection PHP Method

    protected function getNestedSelection($fields)
    {
        if (is_string($fields)) {
            $fields = Tools::listToArray($fields);
        }
        if ($extraSelects = $this->getExtraSelection()) {
            $fields = $fields ? array_merge($fields, $extraSelects) : $extraSelects;
        }
        return $fields;
    }