private:
// description of a PGFT (TODO : better doc)
- unsigned int levels_ = 0;
+ unsigned long levels_ = 0;
std::vector<unsigned int> lowerLevelNodesNumber_; // number of children by node
std::vector<unsigned int> upperLevelNodesNumber_; // number of parents by node
std::vector<unsigned int> lowerLevelPortsNumber_; // ports between each level l and l-1