code: function getRemainingPages() {
          if ($this->nextPage !== null && 
              $this->furthestPage !== null) {
              return $this->getPages($this->nextPage, $this->furthestPage, $this->urlStub);
          }
  
          return false;
      }
docs: Returns an iterator of the remaining pages if both
  $nextPage and $furthestPage are set, otherwise returns false