src/share/classes/sun/awt/AWTAccessor.java

@@ -331,10 +331,16 @@
 
         /**
          * Marks the specified window as an utility window for TrayIcon.
          */
         void setTrayIconWindow(Window w, boolean isTrayIconWindow);
+
+        /**
+         * Return an array containing all the windows this
+         * window currently owns.
+         */
+        Window[] getOwnedWindows(Window w);
     }
 
     /**
      * An accessor for the AWTEvent class.
      */