I'm trying to define a bunch of Leaflet polygons like this :

```js
var poly = new L.Polygon([
  [10.1840229, 36.8906981],
  [10.1840393, 36.8906669],
  [10.1840989, 36.8906868],
  [10.1840826, 36.890718],
  [10.1840229, 36.8906981]
], {
  'id': 'someId'
});

```

Then I'm grouping those polygons in a GroupLayer like so :

```js
var group = new L.LayerGroup([poly1, poly2, ..., polyn]);
group.addTo(map);

```

Can I find those polygons by Id using group.getLayer() ?
Or do I need to define the layers/polygons differently to be able to do this ?