public function toMail() : MailMessage
{
$mailMessage = (new MailMessage())->subject("Successful new backup of `{$this->applicationName()}`")->line("Great news, a new backup of {$this->applicationName()} was successfully created on the disk named {$this->diskName()}.");
$this->backupDestinationProperties()->each(function ($value, $name) use($mailMessage) {
$mailMessage->line("{$name}: {$value}");
});
return $mailMessage;
}