requestNextPage method
Requests next page.
If isLastPage returns this.
Implementation
Future<JSONPaging?> requestNextPage() async {
  if (isLastPage) return this;
  return requestPage(nextPage);
}Requests next page.
If isLastPage returns this.
Future<JSONPaging?> requestNextPage() async {
  if (isLastPage) return this;
  return requestPage(nextPage);
}