public class ScreenViews {

    private static HashMap<String, datatype? > controllerMap = new HashMap<>();

    public static void addController(String name,  datatype? controller) {
        controllerMap.put(name, controller);
    }

    public static datatype? getController(String name) {
        return controllerMap.get(name);
    }

    public static boolean loadFXML(String name, String resource) {
        try {
            FXMLLoader fxLoader = new FXMLLoader(ScreenViews.class.getResource(resource));
            Parent loadedFXML = (Parent) fxLoader.load();
            addController(name, fxLoader.getController());
            return true;
        } catch (IOException e) {
            System.out.println(e.getMessage());
            return false;
        }
    }

    }