Layer is now responsible of its rendering

src/ol/layer/Layer.js

@@ -172,6 +172,20 @@ class Layer extends BaseLayer {
     this.changed();
   }
 
+  /**
+   * In charge to manage the rendering of the layer. One layer type is
+   * bounded with one layer renderer.
+   * @param {?import("../PluggableMap.js").FrameState} frameState Frame state.
+   * @return {HTMLElement} The rendered element.
+   */
+  render(frameState) {
+    const layerRenderer = this.getRenderer();
+    const layerState = this.getLayerState();
+    if (layerRenderer.prepareFrame(frameState, layerState)) {
+      return layerRenderer.renderFrame(frameState, layerState);
+    }
+  }
+
   /**
    * Sets the layer to be rendered on top of other layers on a map. The map will
    * not manage this layer in its layers collection, and the callback in