anchor.diff:        // For interop, dart$Calable's may be used directly as Functions, so handle the
         // non-variadic case that is normally avoided in `get f` above.
         if (_variadicIndex == -1) {
  -          return $dart$core.Function.apply(_function, invocation.positionalArguments, null);
  +        return $dart$core.Function.apply(_function, invocation.positionalArguments, null);
         }
   
         var inArgs = invocation.positionalArguments;
  
positive.code: //
  /////////////////////////////////////////////////
  
  abstract
  class Callable {
  $dart$core.Function get f;
  $dart$core.Function get s;
  }
  
  class dart$Callable implements dart$$Object, $dart$core.Function, Callable {
  
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;
  }
  
  