code: public BoxRequestsFolder.UpdateFolder getRenameRequest(String id, String newName) {
          BoxRequestsFolder.UpdateFolder request = new BoxRequestsFolder.UpdateFolder(id, getFolderInfoUrl(id), mSession)
                  .setName(newName);
          return request;
      }
docs: Gets a request that renames a folder
  
  @param id        id of folder to rename
  @param newName   id of folder to retrieve info on
  @return      request to rename a folder