feat: expose getFlatLayersArray function

elements/map/main.ts

@@ -9,7 +9,7 @@ import { addSelect } from "./src/select";
 import { generateLayers, EoxLayer } from "./src/generate";
 import Interaction from "ol/interaction/Interaction";
 import Control from "ol/control/Control";
-import { getLayerById } from "./src/layer";
+import { getLayerById, getFlatLayersArray } from "./src/layer";
 import { getCenterFromAttribute } from "./src/center";
 import { addInitialControls } from "./src/controls";
 import "./src/compare";
@@ -124,6 +124,8 @@ export class EOxMap extends LitElement {
     return getLayerById(this, layerId);
   };
 
+  getFlatLayersArray = getFlatLayersArray;
+
   render() {
     const shadowStyleFix = `
       :host {