anchor.diff:    void initialize([serialization$DeserializationContextImpl context]) {}
   }
   
  -class serialization$NativeMap {
  +class serialization$NativeMap implements dart$$Basic {
     get(id) {}
     void put(id, instanceOrPartial) {}
     contains(id) {}
  
positive.code: //
  ///////////////////////////////////////
  
  class dart$Callable implements $dart$core.Function, Callable {
    final $dart$core.Function _function;
    final $dart$core.int _variadicIndex;
  
  
negative.code:   }
  }
  
  class dart$UnflatFunction implements dart$$Object, $dart$core.Function, dart$Callable {
    final Callable flatFunction;
  
    dart$UnflatFunction(Callable this.flatFunction);
  