+ explicit NetworkError (std::string s, boost::optional<std::string> d = boost::optional<std::string>());
+
+ std::string summary () const {
+ return _summary;
+ }
+
+ boost::optional<std::string> detail () const {
+ return _detail;
+ }
+
+private:
+ std::string _summary;
+ boost::optional<std::string> _detail;