code: func (dr *DescribeRequest) URLSuffix() string {
  	var buf bytes.Buffer
  	fmt.Fprintf(&buf, "camli/search/describe?depth=%d&maxdirchildren=%d",
  		dr.depth(), dr.maxDirChildren())
  	for _, br := range dr.BlobRefs {
  		buf.WriteString("&blobref=")
  		buf.WriteString(br.String())
  	}
  	if len(dr.BlobRefs) == 0 && dr.BlobRef.Valid() {
  		buf.WriteString("&blobref=")
  		buf.WriteString(dr.BlobRef.String())
  	}
  	if !dr.At.IsAnyZero() {
  		buf.WriteString("&at=")
  		buf.WriteString(dr.At.String())
  	}
  	return buf.String()
  }
docs: // URLSuffix returns the URL suffix for GET requests.
  // This is deprecated.