anchor.diff:    }
   
     if (_logger.isLoggable(Level.FINER)) {
  -    _logger.log("can't set $property in $object");
  +    _logger.finer("can't set $property in $object");
     }
     return false;
   }
  
positive.code:   return _pathRegExp.hasMatch(s);
  }
  
  final _logger = new Logger('observe.PathObserver');
  
negative.code:   }
  
    if (_logger.isLoggable(Level.FINER)) {
      _logger.finer("can't get $property in $object");
    }
    return null;
  }
  