code: public BoxRequestsFile.UpdatedSharedFile getCreateSharedLinkRequest(String id) {
          BoxRequestsFile.UpdatedSharedFile request = new BoxRequestsFile.UpdatedSharedFile(id, getFileInfoUrl(id), mSession)
                  .setAccess(null);
          return request;
      }
docs: Gets a request that creates a shared link for a file
  
  @param id        id of file to create shared link for
  @return      request to create a shared link for a file