protected function formatAttribute($attributeName)
    {
        if (in_array($attributeName, $this->camelizedAttributes)) {
            return preg_replace_callback(
                '/(^|_|\.)+(.)/', function ($match) {
                    return ('.' === $match[1] ? '_' : '').strtoupper($match[2]);
                }, $attributeName
            );
        }

        return $attributeName;
    }