@stof It wasn't - but thinking about how people would interact with the resultPager across requests makes is necesary at this point. If you request the pagination information from the pager i.e. getPagination() you could use a "next" button on your own interface.
But Github does not advise constructing your own urls, just use the full url provided in the link headers. So you'd have to perform a httpclient->get('nextUrl') request, after which you inject the client into the pager and call postFetch once from the outside.