Spatie\Backup\Notifications\Notifications\BackupWasSuccessful::toSlack PHP 메소드

    public function toSlack() : SlackMessage
    {
        return (new SlackMessage())->success()->content('Successful new backup!')->attachment(function (SlackAttachment $attachment) {
            $attachment->fields($this->backupDestinationProperties()->toArray());
        });
    }