func (tag Tag) IsEmpty() bool {
	return tag.Key == ""
}

// Validate checks this tag.
func (tag Tag) Validate() error {
	if len(tag.Key) == 0 || utf8.RuneCountInString(tag.Key) > 128 {
		return errInvalidTagKey
	}

	if utf8.RuneCountInString(tag.Value) > 256 {
		return errInvalidTagValue
	}

	return nil

)

func (tag Tag) String() string {
	return tag.Key + "=" + tag.Value
}

// IsEmpty returns whether this tag is empty or not.
func (tag Tag) IsEmpty() bool {
	return tag.Key == ""
}

// Validate checks this tag.
func (tag Tag) Validate() error {
	if len(tag.Key) == 0 || utf8.RuneCountInString(tag.Key) > 128 {
		return errInvalidTagKey
	}

		return p
	}
	return ""
}

// Tags - a rule can either have tag under <filter></filter> or under
// <filter><and></and></filter>. This method returns all the tags from the
// rule in the format tag1=value1&tag2=value2
func (r Rule) Tags() string {
	if !r.Filter.Tag.IsEmpty() {
		return r.Filter.Tag.String()
	}
	if len(r.Filter.And.Tags) != 0 {
		var buf bytes.Buffer

	return e.EncodeElement(string(*alg), start)
}

// EncryptionAction - for ApplyServerSideEncryptionByDefault XML tag
type EncryptionAction struct {
	Algorithm   Algorithm `xml:"SSEAlgorithm,omitempty"`
	MasterKeyID string    `xml:"KMSMasterKeyID,omitempty"`
}

// Rule - for ServerSideEncryptionConfiguration XML tag
type Rule struct {
	DefaultEncryptionAction EncryptionAction `xml:"ApplyServerSideEncryptionByDefault"`
}

```
commit 99bf4d0c429f04dbd013ba98840d07b759ae1702 (tag: RELEASE.2019-06-15T23-07-18Z)
Author: Harshavardhana <******@****.***>
Date:   Sat Jun 15 11:27:17 2019 -0700

    [security] Match ${aws:username} exactly instead of prefix match (#7791)

                return self.element.find('sts:{}'.format(name), _STS_NS).text
            except _ETREE_EXCEPTIONS as error:
                raise InvalidXMLError(
                    ('Invalid XML provided for "{}" - erroring tag <{}>. '
                     'Message: {}').format(self.root_name, name, error.message)
                )
        else:
            return self.element.findtext('sts:{}'.format(name), None, _STS_NS)

    def text(self):

          go-version: 1.21.x

      - name: github sha short
        id: vars
        run: echo "sha_short=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT

      - name: build-minio
        run: |
          TAG="quay.io/minio/minio:${{ steps.vars.outputs.sha_short }}" make docker

      - name: multipart uploads test
        run: |
          ${GITHUB_WORKSPACE}/.github/workflows/multipart/migrate.sh "${{ steps.vars.outputs.sha_short }}"

			return err
		}
	case !f.Tag.IsEmpty():
		if err := e.EncodeElement(f.Tag, xml.StartElement{Name: xml.Name{Local: "Tag"}}); err != nil {
			return err
		}
	default:
		// Always print Prefix field when both And & Tag are empty
		if err := e.EncodeElement(f.Prefix, xml.StartElement{Name: xml.Name{Local: "Prefix"}}); err != nil {
			return err
		}
	}

	## this is needed because github actions don't have
	## docker-compose on all runners
	go install github.com/docker/compose/v2/cmd@latest
	mv -v /tmp/gopath/bin/cmd /tmp/gopath/bin/docker-compose

	TAG=minio/minio:dev make docker

	MINIO_VERSION=RELEASE.2019-12-19T22-52-26Z docker-compose \
		-f "buildscripts/upgrade-tests/compose.yml" \
		up -d --build

	add_alias

	mc mb minio/minio-test/

	ldflagsStr += " -X github.com/minio/minio/cmd.GOPATH=" + os.Getenv("GOPATH")
	ldflagsStr += " -X github.com/minio/minio/cmd.GOROOT=" + os.Getenv("GOROOT")
	return ldflagsStr
}

// genReleaseTag prints release tag to the console for easy git tagging.
func releaseTag(version string) (string, time.Time) {
	relPrefix := "DEVELOPMENT"
	if prefix := os.Getenv("MINIO_RELEASE"); prefix != "" {
		relPrefix = prefix
	}

	relSuffix := ""