anchor.diff:  
     @override
     void visitFunctionTypeAlias(FunctionTypeAlias node) {
  -    if (!isInLibFolder) return;
  -
       if (!isPrivate(node.name)) {
         check(node);
       }
  
positive.code: 
    @override
    void visitGenericTypeAlias(GenericTypeAlias node) {
      if (!isInLibFolder) return;
  
      if (!isPrivate(node.name)) {
        check(node);
      }
  
negative.code: 
    @override
    void visitFieldDeclaration(FieldDeclaration node) {
      if (!inPrivateMember(node)) {
        for (var field in node.fields.variables) {
          if (!isPrivate(field.name)) {
  