page.go
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,
	}
}
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,
	}
}
// 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.