LinkImpl* create_link(const std::string& name, const std::vector<double>& bandwidth, double latency,
s4u::Link::SharingPolicy policy) override;
Action* communicate(s4u::Host* src, s4u::Host* dst, double size, double rate) override;
LinkImpl* create_link(const std::string& name, const std::vector<double>& bandwidth, double latency,
s4u::Link::SharingPolicy policy) override;
Action* communicate(s4u::Host* src, s4u::Host* dst, double size, double rate) override;