From 10aad08a34c4bc2cf0319f9dadcc3c19a6cd267d Mon Sep 17 00:00:00 2001
From: Abhishek Ghaskata <abhishekghaskata1999@gmail.com>
Date: Sat, 14 Aug 2021 05:32:09 +0530
Subject: [PATCH] add ? (#88019)

---
 packages/flutter/lib/src/material/checkbox.dart | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/flutter/lib/src/material/checkbox.dart b/packages/flutter/lib/src/material/checkbox.dart
index b54b46e33c..ddcd1a8fbb 100644
--- a/packages/flutter/lib/src/material/checkbox.dart
+++ b/packages/flutter/lib/src/material/checkbox.dart
@@ -138,9 +138,9 @@ class Checkbox extends StatefulWidget {
   /// ```dart
   /// Checkbox(
   ///   value: _throwShotAway,
-  ///   onChanged: (bool newValue) {
+  ///   onChanged: (bool? newValue) {
   ///     setState(() {
-  ///       _throwShotAway = newValue;
+  ///       _throwShotAway = newValue!;
   ///     });
   ///   },
   /// )