@Override
    public void destroy(boolean waitFor) {
        if (actualContext == null) throw new IllegalStateException("Not created");

        // destroy parent context
        actualContext.destroy(waitFor);
    }
Accesses the listener that receives events related to this context.

@return the pre-existing instance
jme3-desktop/src/main/java/com/jme3/system/awt/AwtPanelsContext.java