From 40e8620a27f1a608d4df232936a168f134d64d7c Mon Sep 17 00:00:00 2001
From: "Mahdi K. Fard" <xclud@users.noreply.github.com>
Date: Fri, 6 Aug 2021 09:14:50 +0430
Subject: [PATCH] Update dart preamble code. (#87557)

DataTable and Button NNBD docs fixes
---
 packages/flutter/lib/src/material/button_style.dart | 2 +-
 packages/flutter/lib/src/material/data_table.dart   | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/packages/flutter/lib/src/material/button_style.dart b/packages/flutter/lib/src/material/button_style.dart
index 1acdb77bad..b6c3e25490 100644
--- a/packages/flutter/lib/src/material/button_style.dart
+++ b/packages/flutter/lib/src/material/button_style.dart
@@ -35,7 +35,7 @@ import 'theme_data.dart';
 /// ```dart
 /// ElevatedButton(
 ///   style: ButtonStyle(
-///     backgroundColor: MaterialStateProperty.resolveWith<Color>(
+///     backgroundColor: MaterialStateProperty.resolveWith<Color?>(
 ///       (Set<MaterialState> states) {
 ///         if (states.contains(MaterialState.pressed))
 ///           return Theme.of(context).colorScheme.primary.withOpacity(0.5);
diff --git a/packages/flutter/lib/src/material/data_table.dart b/packages/flutter/lib/src/material/data_table.dart
index 6d36b0992f..4389ef24b0 100644
--- a/packages/flutter/lib/src/material/data_table.dart
+++ b/packages/flutter/lib/src/material/data_table.dart
@@ -167,7 +167,7 @@ class DataRow {
   ///
   /// ```dart
   /// DataRow(
-  ///   color: MaterialStateProperty.resolveWith<Color>((Set<MaterialState> states) {
+  ///   color: MaterialStateProperty.resolveWith<Color?>((Set<MaterialState> states) {
   ///     if (states.contains(MaterialState.selected))
   ///       return Theme.of(context).colorScheme.primary.withOpacity(0.08);
   ///     return null;  // Use the default value.
@@ -549,7 +549,7 @@ class DataTable extends StatelessWidget {
   /// {@template flutter.material.DataTable.dataRowColor}
   /// ```dart
   /// DataTable(
-  ///   dataRowColor: MaterialStateProperty.resolveWith<Color>((Set<MaterialState> states) {
+  ///   dataRowColor: MaterialStateProperty.resolveWith<Color?>((Set<MaterialState> states) {
   ///     if (states.contains(MaterialState.selected))
   ///       return Theme.of(context).colorScheme.primary.withOpacity(0.08);
   ///     return null;  // Use the default value.
@@ -597,7 +597,7 @@ class DataTable extends StatelessWidget {
   /// {@template flutter.material.DataTable.headingRowColor}
   /// ```dart
   /// DataTable(
-  ///   headingRowColor: MaterialStateProperty.resolveWith<Color>((Set<MaterialState> states) {
+  ///   headingRowColor: MaterialStateProperty.resolveWith<Color?>((Set<MaterialState> states) {
   ///     if (states.contains(MaterialState.hovered))
   ///       return Theme.of(context).colorScheme.primary.withOpacity(0.08);
   ///     return null;  // Use the default value.