modules/javafx.graphics/src/main/java/com/sun/javafx/tk/Toolkit.java

@@ -359,10 +359,12 @@
      * @throws IllegalStateException if this method is called on a thread
      * other than the FX Application thread
      */
     public abstract void exitNestedEventLoop(Object key, Object rval);
 
+    public abstract void exitAllNestedEventLoops();
+
     public abstract boolean isNestedLoopRunning();
 
     public abstract TKStage createTKStage(Window peerWindow, boolean securityDialog, StageStyle stageStyle, boolean primary, Modality modality, TKStage owner, boolean rtl, AccessControlContext acc);
 
     public abstract TKStage createTKPopupStage(Window peerWindow, StageStyle popupStyle, TKStage owner, AccessControlContext acc);