anchor.diff:  /////////////////////////////////////////////////
   
   $dart$core.String $dartString(String value)
  -  =>  value == null ? null : value._$val;
  +  =>  value == null ? null : value._val;
   
   String $ceylonString($dart$core.String value)
     =>  value == null ? null : new String.withString(value);
  
positive.code: /////////////////////////////////////////////////
  
  $dart$core.double $dartDouble(Float value)
    =>  value == null ? null : value._$float;
  
  Float $ceylonFloat($dart$core.double value)
    =>  value == null ? null : new Float(value);
  
negative.code: 
    @$dart$core.override
    String operator +(String other)
      =>  new String.withString(_val + other._val);
  
    @$dart$core.override
    $dart$core.bool operator >(String other)
      =>  _val.compareTo(other._val) > 0;
  
    @$dart$core.override
    $dart$core.bool operator <(String other)
      =>  _val.compareTo(other._val) < 0;
  
    @$dart$core.override
    $dart$core.bool operator >=(String other)
      =>  _val.compareTo(other._val) >= 0;
  
    @$dart$core.override
    $dart$core.bool operator <=(String other)
      =>  _val.compareTo(other._val) <= 0;
  }
  
  /////////////////////////////////////////////////
  