Add recursive to L.LayerGroup.eachLayer()

It might be useful to add an new option to L.LayerGroup.eachLayer() method for recursive behavior? This could greatly improve management and research possibilities on complex data.

for example:

....geojson loading...

var geo1 = L.geoJson(Geo1);
var geo2 = L.geoJson(Geo2);
var geo3 = L.geoJson(Geo3);
var geo4 = L.geoJson(Geo4);

var group1 = L.LayerGroup([geo1, geo2]);
var group2 = L.LayerGroup([geo3, geo4]);
var groupAll = L.LayerGroup([group1, group2]);

groupAll.eachLayer(function(lay, layParent) {
   console.log(lay, layParent);
}, {
 recursive: true
//new option
})

[Dominique92]

I propose something like:

L.LayerGroup.include({
    eachLayerRecursive: function(method, context) {
        this.eachLayer(function(layer) {
            if (layer._layers)
                layer.eachLayerRecursive(method, context);
            else
                method.call(context, layer);
        });
    }
});

Run method on all LayerGroup tree leaves but not on branches.

[ghybs]

Leaflet.draw as well… http://gis.stackexchange.com/questions/203540/how-to-edit-an-existing-layer-using-leaflet