anchor.diff:  void main() {
     SandboxPage page = new SandboxPage(new PageContext() );
     page.showPage();
  -}+}
  
positive.code:       submitRequest();
      });
      querySelectorAll("#btn-reset").onClick.listen((e) {
        js.context.map.removeAllMarkers();
      }); 
      querySelectorAll("#btn-gpx").onClick.listen((e) {
        js.context.map.displayGpxByKey("user1_jhjhg");
      }); 
      querySelectorAll("#btn-view-gpx").onClick.listen((e) {
        js.context.map.viewGpxByKey("user3_gasdgasdgasdgds");
      });    
      
      
  
negative.code:     
      Element searchResultRow=  querySelector("#search-result-row");
      Element searchResultBody=  querySelector("#search-result-body");
      js.context.getMap().removeAllMarkers();
      if (form.results != null && form.results.isNotEmpty){
          form.results.forEach((lightTrace){
            String gpxUrl = "/trace.gpx/${lightTrace.key}";   
            js.context.getMap().addMarkerToMap( lightTrace.keyJsSafe, lightTrace.activities , lightTrace.titleJsSafe, lightTrace.startPointLatitude,lightTrace.startPointLongitude,gpxUrl );
          });
          js.context.getMap().fitMapViewPortWithMarkers();
      }
      layout.stopLoading();
    }
  