+public:
+ static const int THE_VERSION_0 = 0;
+ static const int THE_VERSION_1 = 20191210;
+
+ /// Attribute name of the version of Angle feature
+ inline static const std::string& VERSION_ID()
+ {
+ static const std::string MY_VERSION_ID("version");
+ return MY_VERSION_ID;
+ }
+
+public: