anchor.diff:                  return $package$empty;
               }
           }
  +    }
  +}
  +class serialization$PartialImpl  extends serialization$Partial {
  +    serialization$PartialImpl([$dart$core.Object _$id]) : super(_$id) {
  +        this._$id = _$id;
  +    }
  +    $dart$core.Object _$id;
  +    void instantiate() {
  +        throw new Exception();
  +    }
  +    void initialize([serialization$DeserializationContextImpl context]) {
  +        throw new Exception();
       }
   }
   abstract class serialization$ReachableReference {
  
positive.code: 
  impl$outerImpl_ get impl$outerImpl => $package$impl$outerImpl;
  
  void $package$impl$$rethrow([Throwable x]) {
      throw x;
  }
  
negative.code: 
  $dart$core.Object measure([$dart$core.Object first, $dart$core.int size]) => $package$measure(first, size);
  
  $dart$core.Object $package$meta$annotations([meta$model$Class annotationType, $dart$core.Object programElement]) => $package$nothing;
  
  $dart$core.Object meta$annotations([meta$model$Class annotationType, $dart$core.Object programElement]) => $package$meta$annotations(annotationType, programElement);
  
  meta$declaration$ClassDeclaration $package$meta$classDeclaration([$dart$core.Object instance]) => $package$nothing as meta$declaration$ClassDeclaration;
  
  meta$declaration$ClassDeclaration meta$classDeclaration([$dart$core.Object instance]) => $package$meta$classDeclaration(instance);
  
  abstract class meta$declaration$AliasDeclaration implements meta$declaration$NestableDeclaration, meta$declaration$GenericDeclaration {
      meta$declaration$OpenType get extendedType;
  }
  