code: public Orderer newOrderer(String name, String grpcURL) throws InvalidArgumentException {
          clientCheck();
          return newOrderer(name, grpcURL, null);
      }
docs: Create a new urlOrderer.
  
  @param name    name of the orderer.
  @param grpcURL url location of orderer grpc or grpcs protocol.
  @return a new Orderer.
  @throws InvalidArgumentException