How to pause execution until a dialog is closed?

[trixon]

I'm trying to add an exit confirmation but it just falls through, the dialog is never shown.

        mStage.addEventFilter(WindowEvent.WINDOW_CLOSE_REQUEST, windowEvent -> {
            if (true) {//TODO Add condition
                var dialog = WorkbenchDialog.builder("title", "message", WorkbenchDialog.Type.CONFIRMATION).onResult(buttonType -> {
                    if (buttonType.getButtonData() != ButtonBar.ButtonData.YES) {
                        windowEvent.consume();
                    }
                }).blocking(true).build();
                mWorkbench.showDialog(dialog);
            }
        });

For this simple test the result is 132, what I want it to be 123.

            System.out.println("1");
            mWorkbench.showConfirmationDialog(
                    "Continue without saving?",
                    "Are you sure you want to continue without saving"
                    + "your document?",
                    buttonType -> { // Proceed and validate the result
                        System.out.println("2");
                    });
            System.out.println("3");

Just speculating here but are there any (overlay transition) listeners or something I could connect a CountDownLatch to?