src/macosx/classes/sun/lwawt/LWWindowPeer.java

@@ -199,15 +199,10 @@
     @Override
     protected LWWindowPeer getWindowPeerOrSelf() {
         return this;
     }
 
-    @Override
-    protected void initializeContainerPeer() {
-        // No-op as LWWindowPeer doesn't have any containerPeer
-    }
-
     // ---- PEER METHODS ---- //
 
     @Override
     protected void disposeImpl() {
         SurfaceData oldData = getSurfaceData();