src/java.desktop/share/classes/javax/swing/plaf/basic/BasicInternalFrameTitlePane.java

@@ -195,10 +195,20 @@
         frame = f;
         installTitlePane();
     }
 
     /**
+     * Gets {@code JInternalFrame} instance
+     *
+     * @return {@code JInternalFrame} instance
+     * @since 12
+     */
+    public JInternalFrame getInternalFrame() {
+        return frame;
+    }
+
+    /**
      * Installs the title pane.
      */
     protected void installTitlePane() {
         installDefaults();
         installListeners();