Spatie\Backup\Notifications\Notifications\BackupHasFailed::toMail PHP Method

    public function toMail() : MailMessage
    {
        $mailMessage = (new MailMessage())->error()->subject("Failed back up of `{$this->applicationName()}`")->line("Important: An error occurred while backing up `{$this->applicationName()}`")->line("Exception message: `{$this->event->exception->getMessage()}`")->line("Exception trace: `{$this->event->exception->getTraceAsString()}`");
        $this->backupDestinationProperties()->each(function ($value, $name) use($mailMessage) {
            $mailMessage->line("{$name}: {$value}");
        });
        return $mailMessage;
    }