code: func GetProposalResponse(prBytes []byte) (*peer.ProposalResponse, error) {
  	proposalResponse := &peer.ProposalResponse{}
  	err := proto.Unmarshal(prBytes, proposalResponse)
  	return proposalResponse, errors.Wrap(err, "error unmarshaling ProposalResponse")
  }
docs: // GetProposalResponse given proposal in bytes