code: public BoxRequestsBookmark.UpdateBookmark getUpdateRequest(String id) {
          BoxRequestsBookmark.UpdateBookmark request = new BoxRequestsBookmark.UpdateBookmark(id, getBookmarkInfoUrl(id), mSession);
          return request;
      }
docs: Gets a request that updates a bookmark's information
  
  @param id    id of bookmark to update information on
  @return      request to update a bookmark's information