code: public BoxRequestsFile.CreateUploadSession getCreateUploadSessionRequest(File file, String folderId)
              throws FileNotFoundException {
          return new BoxRequestsFile.CreateUploadSession(file, folderId, getUploadSessionForNewFileUrl(), mSession);
      }
docs: Gets a request that creates an upload session for uploading a new file
  
  @param  file The file to be uploaded
  @param folderId Folder Id
  @return request to create an upload session for uploading a new file