anchor.diff:      List<jsAst.Expression> argumentsBuffer =
           new List<jsAst.Expression>(
               parameters.parameterCount + extraArgumentCount);
  +    String invocationName = namer.invocationName(selector);
   
       int count = 0;
       if (isInterceptedMethod) {
  
positive.code:    */
    void addParameterStub(FunctionElement member,
                          Selector selector,
                          AddStubFunction addStub,
                          Set<String> alreadyGenerated) {
      FunctionSignature parameters = member.functionSignature;
      int positionalArgumentCount = selector.positionalArgumentCount;
      if (positionalArgumentCount == parameters.parameterCount) {
  
negative.code:               selector.argumentCount, selector.namedArguments);
            if (!selector.appliesUnnamed(member, compiler.world)) continue;
            if (untypedSelectors.add(selector)) {
              addParameterStub(member, selector, defineStub);
            }
          }
        }
  