FindInjector.java

private static void findInjector() {
        EventListener[] eventListeners = context.getServletContext().getContextHandler().getEventListeners();
        for (EventListener eventListener : eventListeners) {
            if (eventListener instanceof ApplicationServletContextListener) {
                injector = ((ApplicationServletContextListener) eventListener).backDoorToInjector();
                break;
            }
        }
    }