anchor.diff:  import 'dart:math';
   
   import 'package:polymer/polymer.dart';
  -import 'package:js_wrapping/js_wrapping.dart';
   
   export 'Events/MouseEvent.dart';
   export 'Events/MarkerEvent.dart';
  
positive.code: import 'Events/TileLayerEvent.dart' as L;
  
  JsObject toJs(var obj){
   if (obj is JsInterface) return asJsObject(obj);
   return new JsObject.jsify(obj);
  }
  
  
negative.code:   }
    
    L.Marker GetMarker(int id) {
      return _markersGroup.getLayer("$id");
    }
    
    Map<int, L.Marker> GetMarkers() {
      Map<int, L.Marker> ret = new Map();
      for(L.ILayer layer in _markersGroup.getLayers()) {
        ret[L.stamp(toJs(layer))] = layer;
      }
      return ret;
    }
  