public:
Actor(const char*name, s4u::Host *host, int argc, char **argv);
Actor(const char*name, s4u::Host *host, int argc, char **argv, double killTime);
public:
Actor(const char*name, s4u::Host *host, int argc, char **argv);
Actor(const char*name, s4u::Host *host, int argc, char **argv, double killTime);