anchor.diff:  
     /// The widget below this widget in the tree.
     ///
  -  /// {@macro flutter.widgets.child}
  +  /// {@template flutter.widgets.child}
  +  /// This widget can only have one child. To lay out multiple children, let this
  +  /// widget's child be a widget such as [Row], [Column], or [Stack], which have a
  +  /// `children` property, and then provide the children to that widget.
  +  /// {@endtemplate}
     final Widget child;
   }
   
  
positive.code:   /// location at which this object was inserted into the tree (i.e., [context])
    /// or on the widget used to configure this object (i.e., [widget]).
    ///
    /// {@macro flutter.widgets.subscriptions}
    ///
    /// You cannot use [BuildContext.inheritFromWidgetOfExactType] from this
    /// method. However, [didChangeDependencies] will be called immediately
  
negative.code: // abstract class RenderFrogJar extends RenderObject { }
  // abstract class FrogJar extends RenderObjectWidget { }
  // abstract class FrogJarParentData extends ParentData { Size size; }
  
  // KEYS
  
  