Ignore in _Location (#96553)

dev/integration_tests/flutter_gallery/lib/demo/material/date_and_time_picker_demo.dart

@@ -10,7 +10,6 @@ import '../../gallery/demo.dart';
 class _InputDropdown extends StatelessWidget {
   const _InputDropdown({
     Key? key,
-    this.child,
     this.labelText,
     this.valueText,
     this.valueStyle,
@@ -21,7 +20,6 @@ class _InputDropdown extends StatelessWidget {
   final String? valueText;
   final TextStyle? valueStyle;
   final VoidCallback? onPressed;
-  final Widget? child;
 
   @override
   Widget build(BuildContext context) {

packages/flutter/lib/src/cupertino/desktop_text_selection.dart

@@ -245,7 +245,6 @@ class _CupertinoDesktopTextSelectionToolbar extends StatelessWidget {
     Key? key,
     required this.anchor,
     required this.children,
-    this.toolbarBuilder = _defaultToolbarBuilder,
   }) : assert(children.length > 0),
        super(key: key);
 
@@ -260,12 +259,6 @@ class _CupertinoDesktopTextSelectionToolbar extends StatelessWidget {
   ///     Mac-style text selection toolbar text button.
   final List<Widget> children;
 
-  /// {@macro flutter.material.TextSelectionToolbar.toolbarBuilder}
-  ///
-  /// The given anchor and isAbove can be used to position an arrow, as in the
-  /// default Cupertino toolbar.
-  final ToolbarBuilder toolbarBuilder;
-
   // Builds a toolbar just like the default Mac toolbar, with the right color
   // background, padding, and rounded corners.
   static Widget _defaultToolbarBuilder(BuildContext context, Widget child) {
@@ -308,7 +301,7 @@ class _CupertinoDesktopTextSelectionToolbar extends StatelessWidget {
         delegate: DesktopTextSelectionToolbarLayoutDelegate(
           anchor: anchor - localAdjustment,
         ),
-        child: toolbarBuilder(context, Column(
+        child: _defaultToolbarBuilder(context, Column(
           mainAxisSize: MainAxisSize.min,
           children: children,
         )),

packages/flutter/lib/src/cupertino/dialog.dart

@@ -1675,11 +1675,7 @@ class _ActionButtonParentDataWidget
 // ParentData applied to individual action buttons that report whether or not
 // that button is currently pressed by the user.
 class _ActionButtonParentData extends MultiChildLayoutParentData {
-  _ActionButtonParentData({
-    this.isPressed = false,
-  });
-
-  bool isPressed;
+  bool isPressed = false;
 }
 
 /// A button typically used in a [CupertinoAlertDialog].

packages/flutter/lib/src/material/about.dart

@@ -16,7 +16,6 @@ import 'constants.dart';
 import 'debug.dart';
 import 'dialog.dart';
 import 'divider.dart';
-import 'floating_action_button.dart';
 import 'floating_action_button_location.dart';
 import 'ink_decoration.dart';
 import 'list_tile.dart';
@@ -983,9 +982,6 @@ enum _ActionLevel {
 
   /// Indicates the master view app bar in the lateral UI.
   view,
-
-  /// Indicates the master page app bar in the nested UI.
-  composite,
 }
 
 /// Describes which layout will be used by [_MasterDetailFlow].
@@ -1019,20 +1015,9 @@ class _MasterDetailFlow extends StatefulWidget {
     Key? key,
     required this.detailPageBuilder,
     required this.masterViewBuilder,
-    this.actionBuilder,
     this.automaticallyImplyLeading = true,
-    this.breakpoint,
-    this.centerTitle,
-    this.detailPageFABGutterWidth,
     this.detailPageFABlessGutterWidth,
     this.displayMode = _LayoutMode.auto,
-    this.flexibleSpace,
-    this.floatingActionButton,
-    this.floatingActionButtonLocation,
-    this.floatingActionButtonMasterPageLocation,
-    this.leading,
-    this.masterPageBuilder,
-    this.masterViewWidth,
     this.title,
   })  : assert(masterViewBuilder != null),
         assert(automaticallyImplyLeading != null),
@@ -1046,13 +1031,6 @@ class _MasterDetailFlow extends StatefulWidget {
   /// builds the master view inside a [Scaffold] with an [AppBar].
   final _MasterViewBuilder masterViewBuilder;
 
-  /// Builder for the master page for nested navigation.
-  ///
-  /// This builder is usually a wrapper around the [masterViewBuilder] builder to provide the
-  /// extra UI required to make a page. However, this builder is optional, and the master page
-  /// can be built using the master view builder and the configuration for the lateral UI's app bar.
-  final _MasterViewBuilder? masterPageBuilder;
-
   /// Builder for the detail page.
   ///
   /// If scrollController == null, the page is intended for nested navigation. The lateral detail
@@ -1061,74 +1039,22 @@ class _MasterDetailFlow extends StatefulWidget {
   /// page is scrollable.
   final _DetailPageBuilder detailPageBuilder;
 
-  /// Override the width of the master view in the lateral UI.
-  final double? masterViewWidth;
-
-  /// Override the width of the floating action button gutter in the lateral UI.
-  final double? detailPageFABGutterWidth;
-
   /// Override the width of the gutter when there is no floating action button.
   final double? detailPageFABlessGutterWidth;
 
-  /// Add a floating action button to the lateral UI. If no [masterPageBuilder] is supplied, this
-  /// floating action button is also used on the nested master page.
-  ///
-  /// See [Scaffold.floatingActionButton].
-  final FloatingActionButton? floatingActionButton;
-
   /// The title for the lateral UI [AppBar].
   ///
   /// See [AppBar.title].
   final Widget? title;
 
-  /// A widget to display before the title for the lateral UI [AppBar].
-  ///
-  /// See [AppBar.leading].
-  final Widget? leading;
-
   /// Override the framework from determining whether to show a leading widget or not.
   ///
   /// See [AppBar.automaticallyImplyLeading].
   final bool automaticallyImplyLeading;
 
-  /// Override the framework from determining whether to display the title in the center of the
-  /// app bar or not.
-  ///
-  /// See [AppBar.centerTitle].
-  final bool? centerTitle;
-
-  /// See [AppBar.flexibleSpace].
-  final Widget? flexibleSpace;
-
-  /// Build actions for the lateral UI, and potentially the master page in the nested UI.
-  ///
-  /// If level is [_ActionLevel.top] then the actions are for
-  /// the entire lateral UI page. If level is [_ActionLevel.view] the actions
-  /// are for the master
-  /// view toolbar. Finally, if the [AppBar] for the master page for the nested UI is being built
-  /// by [_MasterDetailFlow], then [_ActionLevel.composite] indicates the
-  /// actions are for the
-  /// nested master page.
-  final _ActionBuilder? actionBuilder;
-
-  /// Determine where the floating action button will go.
-  ///
-  /// If null, [FloatingActionButtonLocation.endTop] is used.
-  ///
-  /// Also see [Scaffold.floatingActionButtonLocation].
-  final FloatingActionButtonLocation? floatingActionButtonLocation;
-
-  /// Determine where the floating action button will go on the master page.
-  ///
-  /// See [Scaffold.floatingActionButtonLocation].
-  final FloatingActionButtonLocation? floatingActionButtonMasterPageLocation;
-
   /// Forces display mode and style.
   final _LayoutMode displayMode;
 
-  /// Width at which layout changes from nested to lateral.
-  final double? breakpoint;
-
   @override
   _MasterDetailFlowState createState() => _MasterDetailFlowState();
 
@@ -1222,7 +1148,7 @@ class _MasterDetailFlowState extends State<_MasterDetailFlow> implements _PageOp
       case _LayoutMode.auto:
         return LayoutBuilder(builder: (BuildContext context, BoxConstraints constraints) {
           final double availableWidth = constraints.maxWidth;
-          if (availableWidth >= (widget.breakpoint ?? _materialWideDisplayThreshold)) {
+          if (availableWidth >= _materialWideDisplayThreshold) {
             return _lateralUI(context);
           } else {
             return _nestedUI(context);
@@ -1275,21 +1201,13 @@ class _MasterDetailFlowState extends State<_MasterDetailFlow> implements _PageOp
   MaterialPageRoute<void> _masterPageRoute(BuildContext context) {
     return MaterialPageRoute<dynamic>(
       builder: (BuildContext c) => BlockSemantics(
-        child: widget.masterPageBuilder != null
-            ? widget.masterPageBuilder!(c, false)
-            : _MasterPage(
-                leading: widget.leading ??
-                    (widget.automaticallyImplyLeading && Navigator.of(context).canPop()
+        child: _MasterPage(
+                leading: widget.automaticallyImplyLeading && Navigator.of(context).canPop()
                         ? BackButton(onPressed: () => Navigator.of(context).pop())
-                        : null),
+                        : null,
                 title: widget.title,
-                centerTitle: widget.centerTitle,
-                flexibleSpace: widget.flexibleSpace,
                 automaticallyImplyLeading: widget.automaticallyImplyLeading,
-                floatingActionButton: widget.floatingActionButton,
-                floatingActionButtonLocation: widget.floatingActionButtonMasterPageLocation,
                 masterViewBuilder: widget.masterViewBuilder,
-                actionBuilder: widget.actionBuilder,
               ),
       ),
     );
@@ -1312,19 +1230,13 @@ class _MasterDetailFlowState extends State<_MasterDetailFlow> implements _PageOp
   Widget _lateralUI(BuildContext context) {
     _builtLayout = _LayoutMode.lateral;
     return _MasterDetailScaffold(
-      actionBuilder: widget.actionBuilder ?? (_, __) => const<Widget>[],
+      actionBuilder: (_, __) => const<Widget>[],
       automaticallyImplyLeading: widget.automaticallyImplyLeading,
-      centerTitle: widget.centerTitle,
       detailPageBuilder: (BuildContext context, Object? args, ScrollController? scrollController) =>
           widget.detailPageBuilder(context, args ?? _cachedDetailArguments, scrollController),
-      floatingActionButton: widget.floatingActionButton,
       detailPageFABlessGutterWidth: widget.detailPageFABlessGutterWidth,
-      detailPageFABGutterWidth: widget.detailPageFABGutterWidth,
-      floatingActionButtonLocation: widget.floatingActionButtonLocation,
       initialArguments: _cachedDetailArguments,
-      leading: widget.leading,
       masterViewBuilder: (BuildContext context, bool isLateral) => widget.masterViewBuilder(context, isLateral),
-      masterViewWidth: widget.masterViewWidth,
       title: widget.title,
     );
   }
@@ -1335,11 +1247,6 @@ class _MasterPage extends StatelessWidget {
     Key? key,
     this.leading,
     this.title,
-    this.actionBuilder,
-    this.centerTitle,
-    this.flexibleSpace,
-    this.floatingActionButton,
-    this.floatingActionButtonLocation,
     this.masterViewBuilder,
     required this.automaticallyImplyLeading,
   }) : super(key: key);
@@ -1348,11 +1255,6 @@ class _MasterPage extends StatelessWidget {
   final Widget? title;
   final Widget? leading;
   final bool automaticallyImplyLeading;
-  final bool? centerTitle;
-  final Widget? flexibleSpace;
-  final _ActionBuilder? actionBuilder;
-  final FloatingActionButton? floatingActionButton;
-  final FloatingActionButtonLocation? floatingActionButtonLocation;
 
   @override
   Widget build(BuildContext context) {
@@ -1360,16 +1262,10 @@ class _MasterPage extends StatelessWidget {
         appBar: AppBar(
           title: title,
           leading: leading,
-          actions: actionBuilder == null
-              ? const <Widget>[]
-              : actionBuilder!(context, _ActionLevel.composite),
-          centerTitle: centerTitle,
-          flexibleSpace: flexibleSpace,
+          actions: const <Widget>[],
           automaticallyImplyLeading: automaticallyImplyLeading,
         ),
         body: masterViewBuilder!(context, false),
-        floatingActionButton: floatingActionButton,
-        floatingActionButtonLocation: floatingActionButtonLocation,
       );
   }
 
@@ -1386,16 +1282,10 @@ class _MasterDetailScaffold extends StatefulWidget {
     required this.detailPageBuilder,
     required this.masterViewBuilder,
     this.actionBuilder,
-    this.floatingActionButton,
-    this.floatingActionButtonLocation,
     this.initialArguments,
-    this.leading,
     this.title,
     required this.automaticallyImplyLeading,
-    this.centerTitle,
     this.detailPageFABlessGutterWidth,
-    this.detailPageFABGutterWidth,
-    this.masterViewWidth,
   })  : assert(detailPageBuilder != null),
         assert(masterViewBuilder != null),
         super(key: key);
@@ -1409,16 +1299,10 @@ class _MasterDetailScaffold extends StatefulWidget {
   /// lateral page is scrollable.
   final _DetailPageBuilder detailPageBuilder;
   final _ActionBuilder? actionBuilder;
-  final FloatingActionButton? floatingActionButton;
-  final FloatingActionButtonLocation? floatingActionButtonLocation;
   final Object? initialArguments;
-  final Widget? leading;
   final Widget? title;
   final bool automaticallyImplyLeading;
-  final bool? centerTitle;
   final double? detailPageFABlessGutterWidth;
-  final double? detailPageFABGutterWidth;
-  final double? masterViewWidth;
 
   @override
   _MasterDetailScaffoldState createState() => _MasterDetailScaffoldState();
@@ -1437,9 +1321,9 @@ class _MasterDetailScaffoldState extends State<_MasterDetailScaffold>
   void initState() {
     super.initState();
     detailPageFABlessGutterWidth = widget.detailPageFABlessGutterWidth ?? _kDetailPageFABlessGutterWidth;
-    detailPageFABGutterWidth = widget.detailPageFABGutterWidth ?? _kDetailPageFABGutterWidth;
-    masterViewWidth = widget.masterViewWidth ?? _kMasterViewWidth;
-    floatingActionButtonLocation = widget.floatingActionButtonLocation ?? FloatingActionButtonLocation.endTop;
+    detailPageFABGutterWidth = _kDetailPageFABGutterWidth;
+    masterViewWidth = _kMasterViewWidth;
+    floatingActionButtonLocation = FloatingActionButtonLocation.endTop;
   }
 
   @override
@@ -1465,9 +1349,7 @@ class _MasterDetailScaffoldState extends State<_MasterDetailScaffold>
           appBar: AppBar(
             title: widget.title,
             actions: widget.actionBuilder!(context, _ActionLevel.top),
-            leading: widget.leading,
             automaticallyImplyLeading: widget.automaticallyImplyLeading,
-            centerTitle: widget.centerTitle,
             bottom: PreferredSize(
               preferredSize: const Size.fromHeight(kToolbarHeight),
               child: Row(
@@ -1492,16 +1374,13 @@ class _MasterDetailScaffoldState extends State<_MasterDetailScaffold>
             ),
           ),
           body: _masterPanel(context),
-          floatingActionButton: widget.floatingActionButton,
         ),
         // Detail view stacked above main scaffold and master view.
         SafeArea(
           child: Padding(
             padding: EdgeInsetsDirectional.only(
               start: masterViewWidth - _kCardElevation,
-              end: widget.floatingActionButton == null
-                  ? detailPageFABlessGutterWidth
-                  : detailPageFABGutterWidth,
+              end: detailPageFABlessGutterWidth,
             ),
             child: ValueListenableBuilder<Object?>(
               valueListenable: _detailArguments,
@@ -1541,9 +1420,7 @@ class _MasterDetailScaffoldState extends State<_MasterDetailScaffold>
               appBar: AppBar(
                 title: widget.title,
                 actions: widget.actionBuilder!(context, _ActionLevel.top),
-                leading: widget.leading,
                 automaticallyImplyLeading: widget.automaticallyImplyLeading,
-                centerTitle: widget.centerTitle,
               ),
               body: widget.masterViewBuilder(context, true),
             )

packages/flutter/lib/src/material/desktop_text_selection.dart

@@ -236,7 +236,6 @@ class _DesktopTextSelectionToolbar extends StatelessWidget {
     Key? key,
     required this.anchor,
     required this.children,
-    this.toolbarBuilder = _defaultToolbarBuilder,
   }) : assert(children.length > 0),
        super(key: key);
 
@@ -251,12 +250,6 @@ class _DesktopTextSelectionToolbar extends StatelessWidget {
   ///     Material-style desktop text selection toolbar text button.
   final List<Widget> children;
 
-  /// {@macro flutter.material.TextSelectionToolbar.toolbarBuilder}
-  ///
-  /// The given anchor and isAbove can be used to position an arrow, as in the
-  /// default toolbar.
-  final ToolbarBuilder toolbarBuilder;
-
   // Builds a desktop toolbar in the Material style.
   static Widget _defaultToolbarBuilder(BuildContext context, Widget child) {
     return SizedBox(
@@ -290,7 +283,7 @@ class _DesktopTextSelectionToolbar extends StatelessWidget {
         delegate: DesktopTextSelectionToolbarLayoutDelegate(
           anchor: anchor - localAdjustment,
         ),
-        child: toolbarBuilder(context, Column(
+        child: _defaultToolbarBuilder(context, Column(
           mainAxisSize: MainAxisSize.min,
           children: children,
         )),

packages/flutter/lib/src/material/input_decorator.dart

@@ -145,7 +145,6 @@ class _BorderContainer extends StatefulWidget {
     required this.fillColor,
     required this.hoverColor,
     required this.isHovering,
-    this.child,
   }) : assert(border != null),
        assert(gap != null),
        assert(fillColor != null),
@@ -157,7 +156,6 @@ class _BorderContainer extends StatefulWidget {
   final Color fillColor;
   final Color hoverColor;
   final bool isHovering;
-  final Widget? child;
 
   @override
   _BorderContainerState createState() => _BorderContainerState();
@@ -249,7 +247,6 @@ class _BorderContainerState extends State<_BorderContainer> with TickerProviderS
         hoverColorTween: _hoverColorTween,
         hoverAnimation: _hoverAnimation,
       ),
-      child: widget.child,
     );
   }
 }

packages/flutter/lib/src/material/mergeable_material.dart

@@ -151,14 +151,13 @@ class _AnimationTuple {
     required this.startAnimation,
     required this.endAnimation,
     required this.gapAnimation,
-    this.gapStart = 0.0,
   });
 
   final AnimationController controller;
   final CurvedAnimation startAnimation;
   final CurvedAnimation endAnimation;
   final CurvedAnimation gapAnimation;
-  double gapStart;
+  double gapStart = 0.0;
 }
 
 class _MergeableMaterialState extends State<MergeableMaterial> with TickerProviderStateMixin {

packages/flutter/lib/src/material/navigation_bar.dart

@@ -898,18 +898,10 @@ class _ClampTextScaleFactor extends StatelessWidget {
   /// surrounding [child].
   const _ClampTextScaleFactor({
     Key? key,
-    this.lowerLimit = 0,
     this.upperLimit = double.infinity,
     required this.child,
   }) : super(key: key);
 
-  /// The minimum amount that the text scale factor should be for the [child]
-  /// widget.
-  ///
-  /// If this is `.5`, the textScaleFactor for child widgets will never be
-  /// smaller than `.5`.
-  final double lowerLimit;
-
   /// The maximum amount that the text scale factor should be for the [child]
   /// widget.
   ///
@@ -926,7 +918,7 @@ class _ClampTextScaleFactor extends StatelessWidget {
     return MediaQuery(
       data: MediaQuery.of(context).copyWith(
         textScaleFactor: MediaQuery.of(context).textScaleFactor.clamp(
-          lowerLimit,
+          0.0,
           upperLimit,
         ),
       ),

packages/flutter/lib/src/widgets/widget_inspector.dart

@@ -2869,6 +2869,7 @@ class _Location {
     required this.file,
     required this.line,
     required this.column,
+    // ignore: unused_element
     this.name,
   });
 

packages/flutter/test/material/search_test.dart

@@ -1020,14 +1020,6 @@ class _TestSearchDelegate extends SearchDelegate<String> {
 }
 
 class _TestEmptySearchDelegate extends SearchDelegate<String> {
-  _TestEmptySearchDelegate({
-    this.suggestions = 'Suggestions',
-    this.result = 'Result',
-  }) : super();
-
-  final String suggestions;
-  final String result;
-
   @override
   Widget? buildLeading(BuildContext context) => null;
 
@@ -1040,7 +1032,7 @@ class _TestEmptySearchDelegate extends SearchDelegate<String> {
       onPressed: () {
         showResults(context);
       },
-      child: Text(suggestions),
+      child: const Text('Suggestions'),
     );
   }
 
@@ -1057,7 +1049,7 @@ class _TestEmptySearchDelegate extends SearchDelegate<String> {
         tooltip: 'Close',
         icon: const Icon(Icons.arrow_back),
         onPressed: () {
-          close(context, result);
+          close(context, 'Result');
         },
       ),
     );

packages/flutter/test/rendering/recording_canvas.dart

@@ -186,10 +186,9 @@ class TestRecordingPaintingContext extends ClipContext implements PaintingContex
 }
 
 class _MethodCall implements Invocation {
-  _MethodCall(this._name, [ this._arguments = const <dynamic>[], this._typeArguments = const <Type> []]);
+  _MethodCall(this._name, [ this._arguments = const <dynamic>[]]);
   final Symbol _name;
   final List<dynamic> _arguments;
-  final List<Type> _typeArguments;
   @override
   bool get isAccessor => false;
   @override
@@ -205,7 +204,7 @@ class _MethodCall implements Invocation {
   @override
   List<dynamic> get positionalArguments => _arguments;
   @override
-  List<Type> get typeArguments => _typeArguments;
+  List<Type> get typeArguments => const <Type> [];
 }
 
 String _valueName(Object? value) {

packages/flutter/test/rendering/viewport_test.dart

@@ -21,13 +21,11 @@ class _TestSliverPersistentHeaderDelegate extends SliverPersistentHeaderDelegate
     this.key,
     required this.minExtent,
     required this.maxExtent,
-    this.child,
     this.vsync = const TestVSync(),
     this.showOnScreenConfiguration = const PersistentHeaderShowOnScreenConfiguration(),
   });
 
   final Key? key;
-  final Widget? child;
 
   @override
   final double maxExtent;
@@ -42,7 +40,7 @@ class _TestSliverPersistentHeaderDelegate extends SliverPersistentHeaderDelegate
   final PersistentHeaderShowOnScreenConfiguration showOnScreenConfiguration;
 
   @override
-  Widget build(BuildContext context, double shrinkOffset, bool overlapsContent) => child ?? SizedBox.expand(key: key);
+  Widget build(BuildContext context, double shrinkOffset, bool overlapsContent) => SizedBox.expand(key: key);
 
   @override
   bool shouldRebuild(_TestSliverPersistentHeaderDelegate oldDelegate) => true;

packages/flutter/test/widgets/editable_text_show_on_screen_test.dart

@@ -14,7 +14,6 @@ class _TestSliverPersistentHeaderDelegate extends SliverPersistentHeaderDelegate
     required this.maxExtent,
     required this.child,
     this.vsync = const TestVSync(),
-    this.showOnScreenConfiguration = const PersistentHeaderShowOnScreenConfiguration(),
   });
 
   final Widget child;
@@ -29,7 +28,7 @@ class _TestSliverPersistentHeaderDelegate extends SliverPersistentHeaderDelegate
   final TickerProvider? vsync;
 
   @override
-  final PersistentHeaderShowOnScreenConfiguration showOnScreenConfiguration;
+  final PersistentHeaderShowOnScreenConfiguration showOnScreenConfiguration = const PersistentHeaderShowOnScreenConfiguration();
 
   @override
   Widget build(BuildContext context, double shrinkOffset, bool overlapsContent) => child;

packages/flutter/test/widgets/image_filter_quality_test.dart

@@ -72,8 +72,6 @@ Future<void> testImageQuality(WidgetTester tester, ui.FilterQuality? quality) as
 }
 
 class _TestImageStreamCompleter extends ImageStreamCompleter {
-  _TestImageStreamCompleter([this._currentImage]);
-
   ImageInfo? _currentImage;
   final Set<ImageStreamListener> listeners = <ImageStreamListener>{};
 

packages/flutter/test/widgets/slotted_render_object_widget_test.dart

@@ -201,12 +201,10 @@ class _Diagonal extends RenderObjectWidget with SlottedMultiChildRenderObjectWid
     Key? key,
     this.topLeft,
     this.bottomRight,
-    this.backgroundColor,
   }) : super(key: key);
 
   final Widget? topLeft;
   final Widget? bottomRight;
-  final Color? backgroundColor;
 
   @override
   Iterable<_DiagonalSlot> get slots => _DiagonalSlot.values;

packages/flutter/test/widgets/ticker_mode_test.dart

@@ -258,9 +258,7 @@ class _TickingWidgetState extends State<_TickingWidget> with SingleTickerProvide
 }
 
 class _MultiTickingWidget extends StatefulWidget {
-  const _MultiTickingWidget({Key? key, this.onTick}) : super(key: key);
-
-  final VoidCallback? onTick;
+  const _MultiTickingWidget({Key? key}) : super(key: key);
 
   @override
   State<_MultiTickingWidget> createState() => _MultiTickingWidgetState();
@@ -274,7 +272,6 @@ class _MultiTickingWidgetState extends State<_MultiTickingWidget> with TickerPro
   void initState() {
     super.initState();
     ticker = createTicker((Duration _) {
-      widget.onTick?.call();
     })..start();
   }
 

packages/flutter_test/test/widget_tester_test.dart

@@ -809,11 +809,9 @@ class _SingleTickerTestState extends State<_SingleTickerTest> with SingleTickerP
 
 class _AlwaysAnimating extends StatefulWidget {
   const _AlwaysAnimating({
-    this.child,
     required this.onPaint,
   });
 
-  final Widget? child;
   final VoidCallback onPaint;
 
   @override
@@ -846,7 +844,6 @@ class _AlwaysAnimatingState extends State<_AlwaysAnimating> with SingleTickerPro
       builder: (BuildContext context, Widget? child) {
         return CustomPaint(
           painter: _AlwaysRepaint(widget.onPaint),
-          child: widget.child,
         );
       },
     );