recording.go
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
}
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
}
// Next returns the next page of resources. If there are no more resources,
// NoMoreResults is returned.