anchor.diff:  
           return new Semantics(
             label: semanticsLabel,
  +          excludeSemantics: true,
             child: new Container(
               alignment: alignCenterRight,
               padding: textDirectionFactor == 1
  
positive.code:         else
            return new Semantics(
              label: semanticsLabel,
              child: new Container(
                alignment: alignCenterLeft,
                child: new Container(
  
negative.code: const Color _kBackgroundColor = CupertinoColors.white;
  
  
  // The iOS timer picker has its width fixed to 330.0 in all modes.
  //
  // If the maximum width given to the picker is greater than 330.0, the leftmost
  // and rightmost column will be extended equally so that the widths match, and
  // the picker is in the center.
  //
  // If the maximum width given to the picker is smaller than 330.0, the picker is
  // placed in the center and both left side and right side are clipped.
  
  
  /// Different modes of [CupertinoTimerPicker].
  