code: public boolean hasNext(@Nullable CriterionBidLandscapePage page) {
      if (page == null) {
        return true;
      }
      return getTotalLandscapePointsInPage(page) >= pageSize;
    }
docs: Checks if there is still an criterion bid landscape page left to query.
  
  <p>This method is meant to be used with {@link
  ServiceQuery#nextPage(CriterionBidLandscapePage)}. The {@code page} is necessary when using
  DataService, as its paging mechanism is different from other services. For details, see
  https://developers.google.com/adwords/api/docs/guides/bid-landscapes#paging_through_results.
  
  @param page the criterion bid landscape page whose total number of landscape points will be
  used to determine if there is still a page left
  @return true if there is still a page left