Address review comments.
diff --git a/lib/src/rules/unnecessary_final.dart b/lib/src/rules/unnecessary_final.dart
index cb840c2..1b8aba9 100644
--- a/lib/src/rules/unnecessary_final.dart
+++ b/lib/src/rules/unnecessary_final.dart
@@ -63,6 +63,9 @@
   void visitFormalParameterList(FormalParameterList parameterList) {
     for (var node in parameterList.parameters) {
       if (node.isFinal) {
+        // TODO(davidmorgan): for consistency this should report on the
+        // `final` keyword, not the node, but it's hard to get to from
+        // FormalParameter.
         rule.reportLint(node);
       }
     }