modules/javafx.graphics/src/main/java/com/sun/javafx/tk/quantum/QuantumToolkit.java

@@ -609,10 +609,17 @@
         EventLoop eventLoop = eventLoopMap.get(key);
         eventLoopMap.remove(key);
         eventLoop.leave(rval);
     }
 
+    @Override public void exitAllNestedEventLoops() {
+        checkFxUserThread();
+        for (EventLoop eventLoop : eventLoopMap.values()) {
+            eventLoop.leave(null);
+        }
+    }
+
     @Override public TKStage createTKPopupStage(Window peerWindow,
                                                 StageStyle popupStyle,
                                                 TKStage owner,
                                                 AccessControlContext acc) {
         assertToolkitRunning();