Repository: flutter/flutter
File: packages/flutter/lib/src/material/app_bar.dart (Dart)

Code before:
  /// If this is set to true, the app bar will use the default semantic ordering,
  /// which places the flexible space after the main content in the semantics tree.
  /// This affects how screen readers and other assistive technologies navigate the app bar's content.
  ///
  /// Set this to false if you want to customize semantics traversal order in the app bar.
  /// You can then assign [SemanticsSortKey]s to app bar's children to control the order.
  ///
  /// Defaults to true.
  ///
  /// See also:
  ///  * [SemanticsSortKey], which are keys used to define the accessibility traversal order.
  /// {@endtemplate}
  final bool useDefaultSemanticsOrder;

  /// {@macro flutter.material.Material.clipBehavior}
  final Clip? clipBehavior;

  /// {@template flutter.material.appbar.actionsPadding}
  /// The padding between the [actions] and the end of the AppBar.
  ///
  /// Defaults to zero.
  /// {@endtemplate}
  final EdgeInsetsGeometry? actionsPadding;

  bool _getEffectiveCenterTitle(ThemeData theme) {
    bool platformCenter() {
      switch (theme.platform) {
        case TargetPlatform.android:
        case TargetPlatform.fuchsia:
        case TargetPlatform.linux:
        case TargetPlatform.windows:
          return false;
        case TargetPlatform.iOS:
        case TargetPlatform.macOS:
          return actions == null || actions!.length < 2;
      }
    }

    return centerTitle ?? theme.appBarTheme.centerTitle ?? platformCenter();
  }

  @override
  State<AppBar> createState() => _AppBarState();
}

class _AppBarState extends State<AppBar> {
  ScrollNotificationObserverState? _scrollNotificationObserver;
  bool _scrolledUnder = false;

  @override
  void didChangeDependencies() {

Review comment (suggestion):
```suggestion
  /// Whether the background color should be animated when scroll starts and ends.
```

Code after:
  ///
  /// If this is set to true, the app bar will use the default semantic ordering,
  /// which places the flexible space after the main content in the semantics tree.
  /// This affects how screen readers and other assistive technologies navigate the app bar's content.
  ///
  /// Set this to false if you want to customize semantics traversal order in the app bar.
  /// You can then assign [SemanticsSortKey]s to app bar's children to control the order.
  ///
  /// Defaults to true.
  ///
  /// See also:
  ///  * [SemanticsSortKey], which are keys used to define the accessibility traversal order.
  /// {@endtemplate}
  final bool useDefaultSemanticsOrder;

  /// {@macro flutter.material.Material.clipBehavior}
  final Clip? clipBehavior;

  /// {@template flutter.material.appbar.actionsPadding}
  /// The padding between the [actions] and the end of the AppBar.
  ///
  /// Defaults to zero.
  /// {@endtemplate}
  final EdgeInsetsGeometry? actionsPadding;

  /// Whether the color should be animated.
  final bool animateColor;

  bool _getEffectiveCenterTitle(ThemeData theme) {
    bool platformCenter() {
      switch (theme.platform) {
        case TargetPlatform.android:
        case TargetPlatform.fuchsia:
        case TargetPlatform.linux:
        case TargetPlatform.windows:
          return false;
        case TargetPlatform.iOS:
        case TargetPlatform.macOS:
          return actions == null || actions!.length < 2;
      }
    }

    return centerTitle ?? theme.appBarTheme.centerTitle ?? platformCenter();
  }

  @override
  State<AppBar> createState() => _AppBarState();
}

class _AppBarState extends State<AppBar> {
  ScrollNotificationObserverState? _scrollNotificationObserver;