Method GetFactory

cpp/src/arrow/acero/exec_plan.cc:1123–1130

    }

    Result<Factory> GetFactory(const std::string& factory_name) override {
      auto it = factories_.find(factory_name);
      if (it == factories_.end()) {
        return Status::KeyError("ExecNode factory named ", factory_name,
                                " not present in registry.");
      }
      return it->second;
    }

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