void loadDiagram(ifstream &inputStream, const std::string &path); //DFCH
void saveTempActualDiagram(); //FCY
void loadDiagram(ifstream &inputStream, const std::string &path); //DFCH
void saveTempActualDiagram(); //FCY
void loadTempDiagram(unsigned short un); //FCY
unsigned short getUndoState();
unsigned short getRedoState();
void loadTempDiagram(unsigned short un); //FCY
unsigned short getUndoState();
unsigned short getRedoState();