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

*** 195,204 ****
--- 195,214 ----
          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();