anchor.diff:              return new ArraySequence(new Array(list));
           }
       }
  +    List mapElements([Callable mapping]);
  +    static List $mapElements([final List $this, Callable mapping]) => new List$mapElements$$anonymous$8_($this, mapping);
   }
   class loop$$anonymous$0_$$anonymous$1_ implements dart$$Basic, Iterator {
       loop$$anonymous$0_ $outer$ceylon$language$loop$$anonymous$0_;
  
positive.code:     Iterable indexesWhere([Callable selecting]) => List.$indexesWhere(this, selecting);
      $dart$core.int firstIndexWhere([Callable selecting]) => List.$firstIndexWhere(this, selecting);
      $dart$core.int lastIndexWhere([Callable selecting]) => List.$lastIndexWhere(this, selecting);
      Iterable get permutations => Collection.$get$permutations(this);
      Iterable get exceptLast => Iterable.$get$exceptLast(this);
      void each([Callable step]) => Iterable.$each(this, step);
  
negative.code:     Iterable indexesWhere([Callable selecting]) => List.$indexesWhere(this, selecting);
      $dart$core.int firstIndexWhere([Callable selecting]) => List.$firstIndexWhere(this, selecting);
      $dart$core.int lastIndexWhere([Callable selecting]) => List.$lastIndexWhere(this, selecting);
      List mapElements([Callable mapping]) => List.$mapElements(this, mapping);
      Iterable get permutations => Collection.$get$permutations(this);
      Iterable get exceptLast => Iterable.$get$exceptLast(this);
      Iterable flatMap([Callable collecting]) => Iterable.$flatMap(this, collecting);
  