anchor.diff:  }
   
   /// Establishes a subtree in which media queries resolve to the given data.
  +///
  +/// For example, to learn the size of the current media (e.g., the window
  +/// containing your app), you can read the [MediaQueryData.size] property from
  +/// the [MediaQueryData] returned by [MediaQuery.of]:
  +/// `MediaQuery.of(context).size`.
  +///
  +/// Querying the current media using [MediaQuery.of] will cause your widget to
  +/// rebuild automatically whenever the [MediaQueryData] changes (e.g., if the
  +/// user rotates their device).
   class MediaQuery extends InheritedWidget {
     /// Creates a widget that provides [MediaQueryData] to its descendants.
     ///
  
positive.code:   landscape
  }
  
  /// The result of a media query.
  class MediaQueryData {
    /// Creates data for a media query with explicit values.
    ///
  
negative.code:     assert(data != null);
    }
  
    /// Contains information about the current media.
    ///
    /// For example, the [MediaQueryData.size] property contains the width and
    /// height of the current window.
    final MediaQueryData data;
  
    /// The data from the closest instance of this class that encloses the given context.
  