code: protected MultivaluedMap<String, String> getPageQueryParams(int page, int perPage) {
          return (new GitLabApiForm().withParam(PAGE_PARAM, page).withParam(PER_PAGE_PARAM, perPage).asMap());
      }
docs: Creates a MultivaluedMap instance containing "page" and "per_page" params.
  
  @param page the page to get
  @param perPage the number of projects per page
  @return a MultivaluedMap instance containing "page" and "per_page" params