anchor.diff:    Set<InheritedElement> _dependencies;
     bool _hadUnsatisfiedDependencies = false;
   
  -  bool _debugCheckStateIsActiveForAncestorLoopkup() {
  +  bool _debugCheckStateIsActiveForAncestorLookup() {
       assert(() {
         if (_debugLifecycleState != _ElementLifecycle.active) {
           throw new FlutterError(
  
positive.code: 
    @override
    State rootAncestorStateOfType(TypeMatcher matcher) {
      assert(_debugCheckStateIsActiveForAncestorLoopkup());
      Element ancestor = _parent;
      StatefulElement statefulAncestor;
      while (ancestor != null) {
  
negative.code: 
    @override
    InheritedWidget inheritFromWidgetOfExactType(Type targetType) {
      assert(_debugCheckStateIsActiveForAncestorLookup());
      final InheritedElement ancestor = _inheritedWidgets == null ? null : _inheritedWidgets[targetType];
      if (ancestor != null) {
        assert(ancestor is InheritedElement);
  