anchor.diff:            implemented = {};
           }
   
  -        implementedForMixing = {};
           for (var mixin in type.mixins) {
             var interfaceObj = getInterface(mixin);
             _addCandidates(
  
positive.code:     const {},
      <Name>{},
      const {},
      const {},
      const [{}],
      const [],
    );
  
negative.code:     this.declared,
      this.implemented,
      this._noSuchMethodForwarders,
      this._overridden,
      this._superImplemented,
      this.conflicts,
  