anchor.diff:  
     testWidgets('TooltipThemeData implements debugFillProperties', (WidgetTester tester) async {
       final DiagnosticPropertiesBuilder builder = DiagnosticPropertiesBuilder();
  +    const Duration wait = Duration(milliseconds: 100);
  +    const Duration show = Duration(milliseconds: 200);
       const TooltipThemeData(
         height: 15.0,
         padding: EdgeInsets.all(20.0),
  
positive.code:       'semantics: excluded',
        'decoration: BoxDecoration(color: Color(0xffffffff))',
        'textStyle: TextStyle(inherit: true, decoration: TextDecoration.underline)',
        'wait duration: 0:00:00.100000',
        'show duration: 0:00:00.200000',
      ]);
    });
  
  
negative.code:       excludeFromSemantics: true,
        decoration: BoxDecoration(color: Color(0xffffffff)),
        textStyle: TextStyle(decoration: TextDecoration.underline),
        waitDuration: wait,
        showDuration: show,
      ).debugFillProperties(builder);
  
      final List<String> description = builder.properties
  