std::list<std::shared_ptr<VisitedPair>> visitedPairs_;
unsigned long visitedPairsCount_ = 0;
unsigned long expandedPairsCount_ = 0;
std::list<std::shared_ptr<VisitedPair>> visitedPairs_;
unsigned long visitedPairsCount_ = 0;
unsigned long expandedPairsCount_ = 0;