### Issue

How can I add or subtract a certain amount of time from `TimeOfDay _time`

?

Given `TimeOfDay _time = TimeOfDay.now(); //12:42`

, how can I modify the time by adding or subtracting two hours and 10 minutes? For example, adding two hours and 10 minutes would result in `12:52`

while subtracting two hours and 10 minutes would result in `10:52`

and so on.