code: func (r *RecordingPageIterator) Next(ctx context.Context) (*RecordingPage, error) {
  	rp := new(RecordingPage)
  	err := r.p.Next(ctx, rp)
  	if err != nil {
  		return nil, err
  	}
  	r.p.SetNextPageURI(rp.NextPageURI)
  	return rp, nil
  }
docs: // Next returns the next page of resources. If there are no more resources,
  // NoMoreResults is returned.