code: def receive(self, diff, paths):
          
          path = self.selectReceivePath(paths)
          keyName = self._keyName(diff.toUUID, diff.fromUUID, path)
  
          if self._skipDryRun(logger)("receive %s in %s", keyName, self):
              return None
  
          progress = _BotoProgress(diff.size) if self.showProgress is True else None
          return _Uploader(self.bucket, keyName, progress)
docs: Return Context Manager for a file-like (stream) object to store a diff.