code: public BoxRequestsFolder.RestoreTrashedFolder getRestoreTrashedFolderRequest(String id) {
          BoxRequestsFolder.RestoreTrashedFolder request = new BoxRequestsFolder.RestoreTrashedFolder(id, getFolderInfoUrl(id), mSession);
          return request;
      }
docs: Gets a request that restores a trashed folder
  
  @param id        id of folder to restore
  @return      request to restore a folder from the trash