code: func (sh *Handler) NewDescribeRequest() *DescribeRequest {
  	dr := new(DescribeRequest)
  	sh.initDescribeRequest(dr)
  	return dr
  }
docs: // NewDescribeRequest returns a new DescribeRequest holding the state
  // of blobs and their summarized descriptions.  Use DescribeBlob
  // one or more times before calling Result.