s4u::Link::SharingPolicy policy) override;
Action* communicate(s4u::Host* src, s4u::Host* dst, double size, double rate) override;
double next_occuring_event(double now) override;
s4u::Link::SharingPolicy policy) override;
Action* communicate(s4u::Host* src, s4u::Host* dst, double size, double rate) override;
double next_occuring_event(double now) override;