anchor.diff:          );
         }
       }
  -    // Given the hierarchy we are using and the transforms we are applying,
  -    // calling this method probably isn't really necessary.
  -    hierarchy.applyChanges(transformedClasses);
   
       // Transform call sites to pass the location parameter.
       final _WidgetCallSiteTransformer callsiteTransformer =
  
positive.code:       // This application doesn't actually use the package:flutter library.
        return;
      }
  
      final Set<Class> transformedClasses = new Set<Class>.identity();
      final Set<Library> librariesToTransform = new Set<Library>.identity()
  
negative.code:     );
    }
  }
  
  
  /// Rewrites all widget constructors and constructor invocations to add a
  /// parameter specifying the location the constructor was called from.
  