code: private void validateArrowFunction(Node n) {
      if (n.isArrowFunction()) {
        JSDocInfo info = NodeUtil.getBestJSDocInfo(n);
        if (info != null && info.isConstructorOrInterface()) {
          report(n, ARROW_FUNCTION_AS_CONSTRUCTOR);
        }
      }
    }
docs: Check that an arrow function is not annotated with {@constructor}.