Prefix       string
	StorageClass string
}

func (az *warmBackendAzure) tier() *blob.AccessTier {
	if az.StorageClass == "" {
		return nil
	}
	for _, t := range blob.PossibleAccessTierValues() {
		if strings.EqualFold(az.StorageClass, string(t)) {
			return &t
		}
	}
	return nil
}

func (az *warmBackendAzure) getDest(object string) string {
	destObj := object
	if az.Prefix != "" {

      - defaultCaseOrder
      - deprecatedComment
      - docStub
      - dupArg
      - dupBranchBody
      - dupCase
      - dupSubExpr
      - elseif
      - emptyFallthrough
      - equalFold
      - flagDeref
      - flagName
      - hexLiteral
      - indexAlloc
      - initClause
      - methodExprCall
      - nilValReturn
      - octalLiteral
      - offBy1
      - rangeExprCopy

	tierFVMarkerKey := ReservedMetadataPrefixLower + tierFVMarker
	for k, v := range j.MetaSys {
		// Make sure we skip free-version-id, similar to AddVersion()
		if len(k) > len(ReservedMetadataPrefixLower) && strings.EqualFold(k[:len(ReservedMetadataPrefixLower)], ReservedMetadataPrefixLower) {
			// Skip tierFVID, tierFVMarker keys; it's used
			// only for creating free-version.
			switch k {
			case tierFVIDKey, tierFVMarkerKey:

		return toObjectErr(errMethodNotAllowed, bucket, object)
	}
	// verify that the object queued for transition is identical to that on disk.
	if !opts.MTime.Equal(fi.ModTime) || !strings.EqualFold(opts.Transition.ETag, extractETag(fi.Metadata)) {
		return toObjectErr(errFileNotFound, bucket, object)
	}
	// if object already transitioned, return
	if fi.TransitionStatus == lifecycle.TransitionComplete {