// DeleteObjectTagging
		router.Methods(http.MethodDelete).Path("/{object:.+}").
			HandlerFunc(s3APIMiddleware(api.DeleteObjectTaggingHandler, traceHdrsS3HFlag)).
			Queries("tagging", "")
		// SelectObjectContent
		router.Methods(http.MethodPost).Path("/{object:.+}").
			HandlerFunc(s3APIMiddleware(api.SelectObjectContentHandler, traceHdrsS3HFlag)).
			Queries("select", "").Queries("select-type", "2")
		// GetObjectRetention

	}
	if s.Start == nil && s.End == nil {
		// This parameter is optional, but when specified, it must not be empty.
		// Ref: https://docs.aws.amazon.com/AmazonS3/latest/API/API_SelectObjectContent.html#AmazonS3-SelectObjectContent-request-ScanRange
		return errors.New("ScanRange: No Start or End specified")
	}
	if s.Start == nil || s.End == nil {
		return nil
	}
	if *s.Start > *s.End {