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:     }
      JavaScriptConstantCompiler handler = backend.constants;
      List<String> names = selector.getOrderedNamedArguments();
  
      bool isInterceptedMethod = backend.isInterceptedMethod(member);
  
  