Change hitTest signatures to be non-nullable (#87792)

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

@@ -545,7 +545,7 @@ class _RenderInputPadding extends RenderShiftedBox {
     return result.addWithRawTransform(
       transform: MatrixUtils.forceToPoint(center),
       position: center,
-      hitTest: (BoxHitTestResult result, Offset? position) {
+      hitTest: (BoxHitTestResult result, Offset position) {
         assert(position == center);
         return child!.hitTest(result, position: center);
       },

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

@@ -505,7 +505,7 @@ class _RenderInputPadding extends RenderShiftedBox {
     return result.addWithRawTransform(
       transform: MatrixUtils.forceToPoint(center),
       position: center,
-      hitTest: (BoxHitTestResult result, Offset? position) {
+      hitTest: (BoxHitTestResult result, Offset position) {
         assert(position == center);
         return child!.hitTest(result, position: center);
       },

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

@@ -1997,7 +1997,7 @@ class _RenderChipRedirectingHitDetection extends RenderConstrainedBox {
     return result.addWithRawTransform(
       transform: MatrixUtils.forceToPoint(offset),
       position: position,
-      hitTest: (BoxHitTestResult result, Offset? position) {
+      hitTest: (BoxHitTestResult result, Offset position) {
         assert(position == offset);
         return child!.hitTest(result, position: offset);
       },
@@ -2535,7 +2535,7 @@ class _RenderChip extends RenderBox {
       return result.addWithRawTransform(
         transform: MatrixUtils.forceToPoint(center),
         position: position,
-        hitTest: (BoxHitTestResult result, Offset? position) {
+        hitTest: (BoxHitTestResult result, Offset position) {
           assert(position == center);
           return hitTestChild.hitTest(result, position: center);
         },

packages/flutter/lib/src/rendering/box.dart

@@ -2769,9 +2769,9 @@ mixin RenderBoxContainerDefaultsMixin<ChildType extends RenderBox, ParentDataTyp
       final bool isHit = result.addWithPaintOffset(
         offset: childParentData.offset,
         position: position,
-        hitTest: (BoxHitTestResult result, Offset? transformed) {
+        hitTest: (BoxHitTestResult result, Offset transformed) {
           assert(transformed == position - childParentData.offset);
-          return child!.hitTest(result, position: transformed!);
+          return child!.hitTest(result, position: transformed);
         },
       );
       if (isHit)

packages/flutter/lib/src/rendering/editable.dart

@@ -1697,13 +1697,13 @@ class RenderEditable extends RenderBox with RelayoutWhenSystemFontsChangeMixin,
       final bool isHit = result.addWithPaintTransform(
         transform: transform,
         position: position,
-        hitTest: (BoxHitTestResult result, Offset? transformed) {
+        hitTest: (BoxHitTestResult result, Offset transformed) {
           assert(() {
             final Offset manualPosition = (position - textParentData.offset) / textParentData.scale!;
-            return (transformed!.dx - manualPosition.dx).abs() < precisionErrorTolerance
+            return (transformed.dx - manualPosition.dx).abs() < precisionErrorTolerance
               && (transformed.dy - manualPosition.dy).abs() < precisionErrorTolerance;
           }());
-          return child!.hitTest(result, position: transformed!);
+          return child!.hitTest(result, position: transformed);
         },
       );
       if (isHit) {

packages/flutter/lib/src/rendering/flow.dart

@@ -426,8 +426,8 @@ class RenderFlow extends RenderBox
       final bool absorbed = result.addWithPaintTransform(
         transform: transform,
         position: position,
-        hitTest: (BoxHitTestResult result, Offset? position) {
-          return child.hitTest(result, position: position!);
+        hitTest: (BoxHitTestResult result, Offset position) {
+          return child.hitTest(result, position: position);
         },
       );
       if (absorbed)

packages/flutter/lib/src/rendering/paragraph.dart

@@ -465,13 +465,13 @@ class RenderParagraph extends RenderBox
       final bool isHit = result.addWithPaintTransform(
         transform: transform,
         position: position,
-        hitTest: (BoxHitTestResult result, Offset? transformed) {
+        hitTest: (BoxHitTestResult result, Offset transformed) {
           assert(() {
             final Offset manualPosition = (position - textParentData.offset) / textParentData.scale!;
-            return (transformed!.dx - manualPosition.dx).abs() < precisionErrorTolerance
+            return (transformed.dx - manualPosition.dx).abs() < precisionErrorTolerance
               && (transformed.dy - manualPosition.dy).abs() < precisionErrorTolerance;
           }());
-          return child!.hitTest(result, position: transformed!);
+          return child!.hitTest(result, position: transformed);
         },
       );
       if (isHit) {

packages/flutter/lib/src/rendering/proxy_box.dart

@@ -2370,8 +2370,8 @@ class RenderTransform extends RenderProxyBox {
     return result.addWithPaintTransform(
       transform: transformHitTests ? _effectiveTransform : null,
       position: position,
-      hitTest: (BoxHitTestResult result, Offset? position) {
-        return super.hitTestChildren(result, position: position!);
+      hitTest: (BoxHitTestResult result, Offset position) {
+        return super.hitTestChildren(result, position: position);
       },
     );
   }
@@ -2665,8 +2665,8 @@ class RenderFittedBox extends RenderProxyBox {
     return result.addWithPaintTransform(
       transform: _transform,
       position: position,
-      hitTest: (BoxHitTestResult result, Offset? position) {
-        return super.hitTestChildren(result, position: position!);
+      hitTest: (BoxHitTestResult result, Offset position) {
+        return super.hitTestChildren(result, position: position);
       },
     );
   }
@@ -2751,8 +2751,8 @@ class RenderFractionalTranslation extends RenderProxyBox {
           ? Offset(translation.dx * size.width, translation.dy * size.height)
           : null,
       position: position,
-      hitTest: (BoxHitTestResult result, Offset? position) {
-        return super.hitTestChildren(result, position: position!);
+      hitTest: (BoxHitTestResult result, Offset position) {
+        return super.hitTestChildren(result, position: position);
       },
     );
   }
@@ -5283,8 +5283,8 @@ class RenderFollowerLayer extends RenderProxyBox {
     return result.addWithPaintTransform(
       transform: getCurrentTransform(),
       position: position,
-      hitTest: (BoxHitTestResult result, Offset? position) {
-        return super.hitTestChildren(result, position: position!);
+      hitTest: (BoxHitTestResult result, Offset position) {
+        return super.hitTestChildren(result, position: position);
       },
     );
   }

packages/flutter/lib/src/rendering/rotated_box.dart

@@ -104,8 +104,8 @@ class RenderRotatedBox extends RenderBox with RenderObjectWithChildMixin<RenderB
     return result.addWithPaintTransform(
       transform: _paintTransform,
       position: position,
-      hitTest: (BoxHitTestResult result, Offset? position) {
-        return child!.hitTest(result, position: position!);
+      hitTest: (BoxHitTestResult result, Offset position) {
+        return child!.hitTest(result, position: position);
       },
     );
   }

packages/flutter/lib/src/rendering/shifted_box.dart

@@ -87,9 +87,9 @@ abstract class RenderShiftedBox extends RenderBox with RenderObjectWithChildMixi
       return result.addWithPaintOffset(
         offset: childParentData.offset,
         position: position,
-        hitTest: (BoxHitTestResult result, Offset? transformed) {
+        hitTest: (BoxHitTestResult result, Offset transformed) {
           assert(transformed == position - childParentData.offset);
-          return child!.hitTest(result, position: transformed!);
+          return child!.hitTest(result, position: transformed);
         },
       );
     }

packages/flutter/lib/src/rendering/stack.dart

@@ -728,9 +728,9 @@ class RenderIndexedStack extends RenderStack {
     return result.addWithPaintOffset(
       offset: childParentData.offset,
       position: position,
-      hitTest: (BoxHitTestResult result, Offset? transformed) {
+      hitTest: (BoxHitTestResult result, Offset transformed) {
         assert(transformed == position - childParentData.offset);
-        return child.hitTest(result, position: transformed!);
+        return child.hitTest(result, position: transformed);
       },
     );
   }

packages/flutter/lib/src/rendering/table.dart

@@ -1160,9 +1160,9 @@ class RenderTable extends RenderBox {
         final bool isHit = result.addWithPaintOffset(
           offset: childParentData.offset,
           position: position,
-          hitTest: (BoxHitTestResult result, Offset? transformed) {
+          hitTest: (BoxHitTestResult result, Offset transformed) {
             assert(transformed == position - childParentData.offset);
-            return child.hitTest(result, position: transformed!);
+            return child.hitTest(result, position: transformed);
           },
         );
         if (isHit)

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

@@ -768,9 +768,9 @@ class _RenderTheatre extends RenderBox with ContainerRenderObjectMixin<RenderBox
       final bool isHit = result.addWithPaintOffset(
         offset: childParentData.offset,
         position: position,
-        hitTest: (BoxHitTestResult result, Offset? transformed) {
+        hitTest: (BoxHitTestResult result, Offset transformed) {
           assert(transformed == position - childParentData.offset);
-          return child!.hitTest(result, position: transformed!);
+          return child!.hitTest(result, position: transformed);
         },
       );
       if (isHit)

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

@@ -585,9 +585,9 @@ class _RenderSingleChildViewport extends RenderBox with RenderObjectWithChildMix
       return result.addWithPaintOffset(
         offset: _paintOffset,
         position: position,
-        hitTest: (BoxHitTestResult result, Offset? transformed) {
+        hitTest: (BoxHitTestResult result, Offset transformed) {
           assert(transformed == position + -_paintOffset);
-          return child!.hitTest(result, position: transformed!);
+          return child!.hitTest(result, position: transformed);
         },
       );
     }