code: public BoxRequestsFile.UpdateFile getDisableSharedLinkRequest(String id) {
          BoxRequestsFile.UpdateFile request = new BoxRequestsFile.UpdateFile(id, getFileInfoUrl(id), mSession)
                  .setSharedLink(null);
          return request;
      }
docs: Gets a request that disables a shared link for a folder
  
  @param id        id of folder to disable a shared link for
  @return      request to create a shared link for a folder