code: func (o *OutgoingCallerIDService) GetPageIterator(data url.Values) *OutgoingCallerIDPageIterator {
  	iter := NewPageIterator(o.client, data, callerIDPathPart)
  	return &OutgoingCallerIDPageIterator{
  		p: iter,
  	}
  }
docs: // GetPageIterator returns a OutgoingCallerIDPageIterator with the given page
  // filters. Call iterator.Next() to get the first page of resources (and again
  // to retrieve subsequent pages).