@edvin ok 😉 ItemViewModel<WeekTimetable> and ItemViewModel<WeekWorkedSessions>. The first item is the timetable, the second are the working sessions.
1. There is method WeekTimetable.calcTotalMissedTime(s: WeekWorkedSessions). I need to see in the first label the amount of time, when the sessions did not correspond to timetable
2. WeekTimetable.calcMissedTime(val p: Person, s: WeekWorkedSessions) - calculate the missed time for a specific person. I need to output it in the tableview for each of the persons in the WeekTimetable.