std::string getInPortValue(int nodeNumId, std::string portName);
std::string setInPortValue(std::string nodeName, std::string portName, std::string value);
std::string getOutPortValue(int nodeNumId, std::string portName);
std::string getInPortValue(int nodeNumId, std::string portName);
std::string setInPortValue(std::string nodeName, std::string portName, std::string value);
std::string getOutPortValue(int nodeNumId, std::string portName);