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