anchor.diff:          ..add(frameDetailsContainer = div()
             ..layoutVertical()
             ..flex()
  -          ..add(<CoreElement>[frameTabNav, frameFlameChart = FrameFlameChart()])
  +          ..add(<CoreElement>[frameFlameChart = FrameFlameChart()])
             ..attribute('hidden')),
       ]);
   
  
positive.code:     CoreElement frameDetailsContainer;
      FrameFlameChart frameFlameChart;
  
      final PTabNav frameTabNav = PTabNav(<PTabNavTab>[
        PTabNavTab('Frame Timeline'),
        // TODO(kenzie): uncomment these tabs once they are implemented.
        //PTabNavTab('Widget build info'),
        //PTabNavTab('Skia picture'),
      ]);
  
      pauseButton = PButton.icon('Pause recording', FlutterIcons.pause_white_2x)
        ..small()
  
negative.code: 
    void setSelected(TimelineFrameUI frameUI) {
      if (selectedFrame == frameUI) {
        return;
      }
  
      if (selectedFrame != frameUI) {
  