code: func (s *SwarmSyncerClient) BatchDone(stream Stream, from uint64, hashes []byte, root []byte) func() (*TakeoverProof, error) {
  	// TODO: reenable this with putter/getter refactored code
  	// if s.chunker != nil {
  	// 	return func() (*TakeoverProof, error) { return s.TakeoverProof(stream, from, hashes, root) }
  	// }
  	return nil
  }
docs: // BatchDone