#ifdef TIXML_USE_STL
        /** Return Value() as a std::string. If you only use STL,                                                                                                                        │
            this is more efficient than calling Value().                                                                                                                                 │
                Only available in STL mode.                                                                                                                                              │
        */                                                                                                                                                                               │
        const std::string& ValueStr() const { return value; }
        #endif