public function getSanitizedValues(&$values = [])
    {
        array_walk($this->fields, function ($field, $index) use (&$values) {
            if (is_array($field)) {
                return $this->sanitizeConditionalValues($values, $field, $index);
            }

            return $this->sanitizeValues($values[$field->getSlug()], $field);
        });

        return $values;
    }