Private if not used elsewhere; underscore suffix only if private

src/ol/renderer/webgl/PointsLayer.js

@@ -292,7 +292,11 @@ class WebGLPointsLayerRenderer extends WebGLLayerRenderer {
      */
     this.generateBuffersRun_ = 0;
 
+    /**
+     * @private
+     */
     this.worker_ = createWebGLWorker();
+
     this.worker_.addEventListener(
       'message',
       /**

src/ol/renderer/webgl/VectorLayer.js

@@ -156,8 +156,14 @@ class WebGLVectorLayerRenderer extends WebGLLayerRenderer {
       DEFAULT_POINT_FRAGMENT;
     this.pointAttributes_ = toAttributesArray(pointAttributesWithDefault);
 
+    /**
+     * @private
+     */
     this.worker_ = createWebGLWorker();
 
+    /**
+     * @private
+     */
     this.batch_ = new MixedGeometryBatch();
 
     const source = this.getLayer().getSource();