From 53ba53cfdf9440b2ca9ce6344b50ec22f7cc4714 Mon Sep 17 00:00:00 2001
From: "Lasse R.H. Nielsen" <lrn@google.com>
Date: Thu, 9 Mar 2023 16:24:40 +0100
Subject: [PATCH] Change `extends Iterator` to using `implements`

The Dart 3.0 libraries will mark `Iterator` with the `interface` class modifier, which prevents `extends`.
It will do so because the class has no implementation to inherit, and is only intended as an interface,
which it is now possible to express.
---
 lib/web_ui/lib/src/engine/dom.dart | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/web_ui/lib/src/engine/dom.dart b/lib/web_ui/lib/src/engine/dom.dart
index 034899755f56c..01b9da8199174 100644
--- a/lib/web_ui/lib/src/engine/dom.dart
+++ b/lib/web_ui/lib/src/engine/dom.dart
@@ -2053,7 +2053,7 @@ extension DomListExtension on _DomList {
       js_util.callMethod<DomNode>(this, 'item', <Object>[index.toDouble()]);
 }
 
-class _DomListIterator<T> extends Iterator<T> {
+class _DomListIterator<T> implements Iterator<T> {
   _DomListIterator(this.list);
 
   final _DomList list;
@@ -2101,7 +2101,7 @@ extension DomTouchListExtension on _DomTouchList {
       js_util.callMethod<DomTouch>(this, 'item', <Object>[index.toDouble()]);
 }
 
-class _DomTouchListIterator<T> extends Iterator<T> {
+class _DomTouchListIterator<T> implements Iterator<T> {
   _DomTouchListIterator(this.list);
 
   final _DomTouchList list;