anchor.diff:  //
   /////////////////////////////////////////////////
   
  -abstract
  -class Callable {
  -$dart$core.Function get f;
  -$dart$core.Function get s;
  +abstract class Callable {
  +  $dart$core.Function get f;
  +  $dart$core.Function get s;
   }
   
   class dart$Callable implements dart$$Object, $dart$core.Function, Callable {
  
positive.code:   String.withString($dart$core.String s) : super.withString(s) {}
  
    @$dart$core.override
    String get self => this;
  
    @$dart$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;
  }
  
  /////////////////////////////////////////////////
  
negative.code:   =>  intSet(integer, index, bit);
  
  $dart$core.int intSet($dart$core.int integer, $dart$core.int index, $dart$core.bool bit) {
    if (index < 0 || index > 31) {
      // Match JS behavior, for now
      // https://github.com/ceylon/ceylon/issues/5799
      //return new Integer(_value.toSigned(32));
      return integer;
    }
    $dart$core.int mask = (1 << index).toSigned(32);
    if (bit) {
      return integer.toSigned(32) | mask;
    }
    else {
      return integer.toSigned(32) & ~mask;
    }
  }
  
  $dart$core.int $package$intFlip($dart$core.int integer, $dart$core.int index)
    =>  intFlip(integer, index);
  
  $dart$core.int intFlip($dart$core.int integer, $dart$core.int index) {
    if (index < 0 || index > 31) {
      // Match JS behavior, for now
      // https://github.com/ceylon/ceylon/issues/5799
      //return new Integer(_value.toSigned(32));
      return integer;
    }
    $dart$core.int mask = (1 << index).toSigned(32);
    return integer.toSigned(32) ^ mask;
  }
  
  