| 12345678910111213141516171819 | #pragma once#include <map>     // for map#include <memory>  // for unique_ptr#include <string>  // for stringnamespace bell {class MDNSService { public:  virtual ~MDNSService() {}  static std::unique_ptr<MDNSService> registerService(      const std::string& serviceName, const std::string& serviceType,      const std::string& serviceProto, const std::string& serviceHost,      int servicePort, const std::map<std::string, std::string> txtData);  virtual void unregisterService() = 0;};}  // namespace bell
 |