New Layer#getFeatures method with fast hit detection for VectorLayer

src/ol/renderer/Layer.js

@@ -30,6 +30,16 @@ class LayerRenderer extends Observable {
 
   }
 
+  /**
+   * Asynchronous layer level hit detection.
+   * @param {import("../pixel.js").Pixel} pixel Pixel.
+   * @return {Promise<Array<import("../Feature").default>>} Promise that resolves with
+   * an array of features.
+   */
+  getFeatures(pixel) {
+    return abstract();
+  }
+
   /**
    * Determine whether render should be called.
    * @abstract