private async Task changeStartTime()
{
IsEditingStartDate = true;
var currentTime = timeService.CurrentDateTime;
var minDate = currentTime.AddHours(-MaxTimeEntryDurationInHours);
var parameters = DatePickerParameters.WithDates(StartTime, minDate, currentTime);
StartTime = await navigationService
.Navigate <SelectDateTimeViewModel, DatePickerParameters, DateTimeOffset>(parameters)
.ConfigureAwait(false);
IsEditingStartDate = false;
}
protected DatePickerParameters GenerateParameterForTime(DateTimeOffset now) => DatePickerParameters.WithDates(now, now.AddHours(-1), now.AddHours(+1));
