Use super.method instead of prototype.method.call

src/ol/source/Cluster.js

@@ -143,7 +143,7 @@ class Cluster extends VectorSource {
     this.clear();
     this.cluster();
     this.addFeatures(this.features);
-    VectorSource.prototype.refresh.call(this);
+    super.refresh();
   }
 
   /**

src/ol/source/ImageStatic.js

@@ -132,7 +132,7 @@ class Static extends ImageSource {
         this.image_.setImage(canvas);
       }
     }
-    ImageSource.prototype.handleImageChange.call(this, evt);
+    super.handleImageChange(evt);
   }
 }
 

src/ol/source/TileImage.js

@@ -130,7 +130,7 @@ class TileImage extends UrlTile {
    */
   canExpireCache() {
     if (!ENABLE_RASTER_REPROJECTION) {
-      return UrlTile.prototype.canExpireCache.call(this);
+      return super.canExpireCache();
     }
     if (this.tileCache.canExpireCache()) {
       return true;
@@ -149,7 +149,7 @@ class TileImage extends UrlTile {
    */
   expireCache(projection, usedTiles) {
     if (!ENABLE_RASTER_REPROJECTION) {
-      UrlTile.prototype.expireCache.call(this, projection, usedTiles);
+      super.expireCache(projection, usedTiles);
       return;
     }
     const usedTileCache = this.getTileCacheForProjection(projection);
@@ -188,7 +188,7 @@ class TileImage extends UrlTile {
         this.getProjection() && projection && !equivalent(this.getProjection(), projection)) {
       return false;
     } else {
-      return UrlTile.prototype.getOpaque.call(this, projection);
+      return super.getOpaque(projection);
     }
   }