anchor.diff:  )
   class MaterialTimePickerComponent extends KeyboardHandlerMixin
       implements HasDisabled, OnInit, OnDestroy {
  +  static const minutesInDay = 24 * 60;
     static DateTime _utcTime(int hour, [int minute = 0]) => DateTime.utc(
         _unixEpoch.year, _unixEpoch.month, _unixEpoch.day, hour, minute);
   
  
positive.code:     DateFormat.jms(),
      DateFormat.Hms()
    ];
  
    final Clock _clock;
    final _disposer = Disposer.oneShot();
  
negative.code:   String renderTime(DateTime time) => outputFormat.format(time);
  
    MaterialTimePickerComponent(@Inject(datepickerClock) this._clock) {
      timeOptions =
          TimeSelectionOptions(_generateTimeOptions(_increment, utc: _utc));
    }
  
    @override
  