code: public String getPackageId() throws ProposalException {
  
          Lifecycle.QueryInstalledChaincodeResult queryInstalledChaincodeResult = parsePayload();
  
          if (queryInstalledChaincodeResult == null) {
              return null;
          }
          return queryInstalledChaincodeResult.getPackageId();
  
      }
docs: The packageId for this chaincode.
  
  @return the packageId
  @throws ProposalException