Spatie\Backup\Tasks\Backup\BackupJob::onlyBackupTo PHP Method

    public function onlyBackupTo(string $diskName) : BackupJob
    {
        $this->backupDestinations = $this->backupDestinations->filter(function (BackupDestination $backupDestination) use($diskName) {
            return $backupDestination->diskName() === $diskName;
        });
        if (!count($this->backupDestinations)) {
            throw InvalidBackupJob::destinationDoesNotExist($diskName);
        }
        return $this;
    }