code: function _getProposalResponseResults(proposal_response) {
  	if (!proposal_response.payload) {
  		throw new Error('Parameter must be a ProposalResponse Object');
  	}
  	const payload = _responseProto.ProposalResponsePayload.decode(proposal_response.payload);
  	const extension = _proposalProto.ChaincodeAction.decode(payload.extension);
  	// TODO should we check the status of this action
  	logger.debug('_getWriteSet - chaincode action status:%s message:%s', extension.response.status, extension.response.message);
  	// return a buffer object which has an equals method
  	return extension.results.toBuffer();
  }
docs: internal utility method to decode and get the write set from a proposal response