code: public BoxRequestsBookmark.DeleteTrashedBookmark getDeleteTrashedBookmarkRequest(String id) {
          BoxRequestsBookmark.DeleteTrashedBookmark request = new BoxRequestsBookmark.DeleteTrashedBookmark(id, getTrashedBookmarkUrl(id), mSession);
          return request;
      }
docs: Gets a request that permanently deletes a bookmark from the trash
  
  @param id        id of bookmark to delete from the trash
  @return      request to permanently delete a bookmark from the trash