Fix nullability

dnfield · dnfield · commit f75d1234312b · 2020-09-22T12:16:03.000-07:00
diff --git a/lib/web_ui/test/golden_tests/engine/recording_canvas_golden_test.dart b/lib/web_ui/test/golden_tests/engine/recording_canvas_golden_test.dart
@@ -726,7 +726,7 @@ class TestImage implements Image {
   @override
   Image clone() => this;
 
-  List<StackTrace>? debugGetOpenHandleStackTraces() => <StackTrace>[];
+  List<StackTrace>/*?*/ debugGetOpenHandleStackTraces() => <StackTrace>[];
 }
 
 Paragraph createTestParagraph() {

Original file line number	Diff line number	Diff line change
`@@ -726,7 +726,7 @@ class TestImage implements Image {`
`726`	`726`	`@override`
`727`	`727`	`Image clone() => this;`
`728`	`728`
`729`		`- List<StackTrace>? debugGetOpenHandleStackTraces() => <StackTrace>[];`
	`729`	`+ List<StackTrace>/?/ debugGetOpenHandleStackTraces() => <StackTrace>[];`
`730`	`730`	`}`
`731`	`731`
`732`	`732`	`Paragraph createTestParagraph() {`