notify::read PHP Method

    public static function read()
    {
        $types = Session::get('messages');
        // no messages no problem
        if (is_null($types)) {
            return '';
        }
        $html = '';
        foreach ($types as $type => $messages) {
            foreach ($messages as $message) {
                $html .= sprintf(static::$mwrap, $type, implode('<br>', (array) $message));
            }
        }
        Session::erase('messages');
        return sprintf(static::$wrap, $html);
    }