public static function pop(array $array, $key)
    {
        $keys = explode('.', $key);
        foreach($keys as $key) {
            if(!isset($array[$key])) {
                return null;
            }
            $array = $array[$key];
        }

        if(!is_array($array)) {
            return null;
        }

        return array_pop($array);
    }