clone() {
        const me = this,
            timetable = new TrainTimetable();

        timetable.id = me.id;
        timetable.t = me.t;
        timetable.r = me.r;
        timetable.n = me.n;
        timetable.y = me.y;
        timetable.d = me.d;
        timetable.os = me.os;
        timetable.ds = me.ds;
        timetable.pt = me.pt;
        timetable.nt = me.nt;
        timetable.stations = me.stations.slice();
        timetable.arrivalTimes = me.arrivalTimes.slice();
        timetable.departureTimes = me.departureTimes.slice();
        timetable.nm = me.nm;
        timetable.v = me.v;
        timetable.start = me.start;
        timetable.end = me.end;
        return timetable;
    }
Next train tametables.
@type {Array<TrainTimetable>}