Currently the rt-closed/javafx-ui-quantum/src/com/sun/javafx/tk/quantum/FxEventLoop.java uses the com.sun.glass.ui.Application.enter/leaveNestedEventLoop() methods directly. These methods are going to be declared as package private in the near future.

The FxEventLoop must be rewritten to use the methods available in the QuantumToolkit class in order to manipulate nested event loops.