code: func NewNextPageIterator(client *Client, nextPageURI string) *PageIterator {
  	if nextPageURI == "" {
  		panic("nextpageuri is empty")
  	}
  	return &PageIterator{
  		data:        url.Values{},
  		client:      client,
  		nextPageURI: types.NullString{Valid: true, String: nextPageURI},
  		pathPart:    "",
  		count:       0,
  	}
  }
docs: // NewNextPageIterator returns a PageIterator based on the provided
  // nextPageURI, and is designed for iterating if you have a nextPageURI and not
  // a list of query values.
  //
  // NewNextPageIterator panics if nextPageURI is empty.