func (j BatchJobRequest) Type() madmin.BatchJobType {
	switch {
	case j.Replicate != nil:
		return madmin.BatchJobReplicate
	case j.KeyRotate != nil:
		return madmin.BatchJobKeyRotate
	case j.Expire != nil:
		return madmin.BatchJobExpire
	}
	return madmin.BatchJobType("unknown")
}

// Validate validates the current job, used by 'save()' before