anchor.diff:  /// An identifier used to select a user's language and formatting preferences,
   /// consisting of a language and a country. This is a subset of locale
   /// identifiers as defined by BCP 47.
  +///
  +/// See also:
  +///
  +///  * [Window.locale], which specifies the system's currently selected
  +///    [Locale].
   class Locale {
     /// Creates a new Locale object. The first argument is the
     /// primary language subtag, the second is the region subtag.
     ///
     /// For example:
     ///
  -  ///     const Locale swissFrench = const Locale('fr', 'CH');
  -  ///     const Locale canadianFrench = const Locale('fr', 'CA');
  +  /// ```dart
  +  /// const Locale swissFrench = const Locale('fr', 'CH');
  +  /// const Locale canadianFrench = const Locale('fr', 'CA');
  +  /// ```
     const Locale(this.languageCode, this.countryCode);
   
     /// The primary language subtag for the locale.
  
positive.code:   /// The [onDrawFrame] callback is invoked immediately after [onBeginFrame],
    /// after draining any microtasks (e.g. completions of any [Future]s) queued
    /// by the [onBeginFrame] handler.
    FrameCallback onBeginFrame;
  
    /// A callback that is invoked for each frame after [onBeginFrame] has
    /// completed and after the microtask queue has been drained. This can be
    /// used to implement a second phase of frame rendering that happens
    /// after any deferred work queued by the [onBeginFrame] phase.
    VoidCallback onDrawFrame;
  
    /// A callback that is invoked when pointer data is available.
    PointerDataPacketCallback onPointerDataPacket;
  
    /// The route or path that the operating system requested when the application
  
negative.code:   /// likely place system UI (such as the Android system notification area), or
    /// which might be rendered outside of the physical display (e.g. overscan
    /// regions on television screens).
    ///
    /// See also:
    ///
    ///  * [WidgetsBindingObserver], for a mechanism at the widgets layer to
    ///    observe when this value changes.
    ///  * [MediaQuery.of], a simpler mechanism for the same.
    ///  * [Scaffold], which automatically applies the padding in material design
    ///    applications.
    WindowPadding get padding => _padding;
    WindowPadding _padding = WindowPadding.zero;
  
  