anchor.diff:  
     @override
     void visitExtensionOverride(ExtensionOverride node) {
  -    _writeNextCodeLine(node);
       _writeln('ExtensionOverride');
       _withIndent(() {
         _writeNamedChildEntities(node);
  
positive.code: 
    @override
    void visitDeclaredIdentifier(DeclaredIdentifier node) {
      _writeNextCodeLine(node);
      _writeln('DeclaredIdentifier');
      _withIndent(() {
        _writeNamedChildEntities(node);
  
negative.code: 
    @override
    void visitSwitchStatement(SwitchStatement node) {
      _writeln('SwitchStatement');
      _withIndent(() {
        _writeNamedChildEntities(node);
  