public:
Event(std::string name, double start_time, double end_time, std::string type)
: name(name), start_time(start_time), end_time(end_time), type(type){}
public:
Event(std::string name, double start_time, double end_time, std::string type)
: name(name), start_time(start_time), end_time(end_time), type(type){}