Method AddFactory

cpp/src/arrow/acero/exec_plan.cc:1132–1142

    }

    Status AddFactory(std::string factory_name, Factory factory) override {
      auto it_success = factories_.emplace(std::move(factory_name), std::move(factory));

      if (!it_success.second) {
        const auto& factory_name = it_success.first->first;
        return Status::KeyError("ExecNode factory named ", factory_name,
                                " already registered.");
      }

      return Status::OK();
    }

   private:
    std::unordered_map<std::string, Factory> factories_;