diff --git a/public/dart/fuchsia_scenic_flutter/lib/src/child_view_render_box.dart b/public/dart/fuchsia_scenic_flutter/lib/src/child_view_render_box.dart
index de437d5..0880f23 100644
--- a/public/dart/fuchsia_scenic_flutter/lib/src/child_view_render_box.dart
+++ b/public/dart/fuchsia_scenic_flutter/lib/src/child_view_render_box.dart
@@ -188,7 +188,9 @@
   S find<S>(Offset regionOffset) => null;
 
   @override
-  Iterable<S> findAll<S>(Offset regionOffset) => <S>[];
+  Iterable<S> findAll<S>(Offset regionOffset) { // ignore: override_on_non_overriding_member
+    return <S>[];
+  }
 
   @override
   bool findAnnotations<S>(AnnotationResult<S> result, Offset localPosition,