if s3Key.RuleList.isEmpty() {
		return nil
	}
	type s3KeyWrapper S3Key
	return e.EncodeElement(s3KeyWrapper(s3Key), start)
}

// common - represents common elements inside <QueueConfiguration>, <CloudFunctionConfiguration>
// and <TopicConfiguration>
type common struct {
	ID     string `xml:"Id" json:"Id"`
	Filter S3Key  `xml:"Filter" json:"Filter"`
	Events []Name `xml:"Event" json:"Event"`
}

	      <Queue>arn:minio:sqs:us-east-1:1:webhook</Queue>
	      <Event>s3:ObjectAccessed:*</Event>
	      <Event>s3:ObjectCreated:*</Event>
	      <Event>s3:ObjectRemoved:*</Event>
	   </QueueConfiguration>
	   <CloudFunctionConfiguration>
	      <Id>1</Id>
	      <Filter>
	             <S3Key>
	                 <FilterRule>
	                     <Name>suffix</Name>
	                     <Value>.jpg</Value>