anchor.diff:          outArgs.fillRange(initialLength, _variadicIndex, dart$default);
           outArgs[_variadicIndex] = empty;
         }
  +
         return $dart$core.Function.apply(_function, outArgs, null);
       }
       else if (invocation.memberName == #s) {
  
positive.code: 
  abstract
  class Callable {
      $dart$core.Function f;
      $dart$core.Function s;
  }
  
  //
  
negative.code:           outArgs[_variadicIndex]
                = new Tuple.$withList(inArgs.sublist(initialLength, inArgs.length - 1), seq);
          }
  
          return $dart$core.Function.apply(_function, outArgs, null);
        }
      }
  