all these changes

frontend/node_modules/react-leaflet/lib/LayerGroup.js

@@ -0,0 +1,8 @@
+import { createElementObject, createLayerComponent, extendContext } from '@react-leaflet/core';
+import { LayerGroup as LeafletLayerGroup } from 'leaflet';
+export const LayerGroup = createLayerComponent(function createLayerGroup({ children: _c , ...options }, ctx) {
+    const group = new LeafletLayerGroup([], options);
+    return createElementObject(group, extendContext(ctx, {
+        layerContainer: group
+    }));
+});