anchor.diff:      if (!node.isSetter &&
           node.returnType == null &&
           node.name.token.type != TokenType.INDEX_EQ) {
  -      rule.reportLint(node.name);
  +      rule.reportLint(node.name,
  +          arguments: [node.name.name], errorCode: methodCode);
       }
     }
   }
  
positive.code: }
  
  class _Visitor extends SimpleAstVisitor<void> {
    final LintRule rule;
  
    _Visitor(this.rule);
  
negative.code:   @override
    void visitFunctionDeclaration(FunctionDeclaration node) {
      if (!node.isSetter && node.returnType == null) {
        rule.reportLint(node.name,
            arguments: [node.name.name], errorCode: functionCode);
      }
    }
  
    @override
    void visitFunctionTypeAlias(FunctionTypeAlias node) {
      if (node.returnType == null) {
        rule.reportLint(node.name,
            arguments: [node.name.name], errorCode: functionCode);
      }
    }
  
  