anchor.diff:  
     // TODO change to "==" once compiler handles this
     $dart$core.bool equals($dart$core.Object other) {
  -    if (other is Integer) {
  +    if (other is String) {
         return _value == other._value;
       }
       return false;
  
positive.code:     // simulate anonymous class
      return new _$ListIterator_anon($this, index);
    }
  }
  
  // Simulate anonymous class
  
negative.code:   @$dart$core.override
    $dart$core.bool get empty
      =>  List.$empty(this);
  
    $dart$core.bool equals($dart$core.Object other)
      =>  List.$equals(this, other);
  
    @$dart$core.override
    get($dart$core.Object index)
  