anchor.diff:    /// Ongoing gestures within the current route are canceled when a new route is
     /// pushed.
     ///
  -  /// Returns a [Future] that completes to the `result` value passed to [pop]
  -  /// when the pushed route is popped off the navigator.
  -  ///
     /// The `T` type argument is the type of the return value of the route.
     /// {@endtemplate}
  +  ///
  +  /// {@macro flutter.widgets.navigator.pushNamed.returnValue}
     ///
     /// {@tool snippet}
     ///
  
positive.code:   /// Ongoing gestures within the current route are canceled when a new route is
    /// pushed.
    ///
    /// Returns a [Future] that completes to the `result` value passed to [pop]
    /// when the pushed route is popped off the navigator.
    ///
    /// The `T` type argument is the type of the return value of the route.
    ///
    /// To use [pushNamed], an [Navigator.onGenerateRoute] callback must be
    /// provided,
    /// {@endtemplate}
    ///
    /// {@template flutter.widgets.Navigator.pushNamed}
  
negative.code:   /// finished animating in.
    ///
    /// {@macro flutter.widgets.navigator.pushReplacementNamed}
    ///
    /// {@macro flutter.widgets.navigator.pushNamed.returnValue}
    ///
    /// {@macro flutter.widgets.Navigator.pushNamed}
    ///
  