Method visit

native/desc/Node.cpp:18–21

            : _visitedCount(0), _id(0) {}

    void Node::visit(time_t timestamp) {
        _visitedCount++;
        BDLOG("visit id:%s times %d", this->getId().c_str(), this->_visitedCount);
    }

    std::string Node::toString() const {
        return this->getId();