docs: @JsIgnore
    public static void initWithoutVueLib() {
      if (!isVueLibInjected()) {
        throw new RuntimeException(
            "Couldn't find Vue.js on init. Either include it Vue.js in your index.html or call VueGWT.init() instead of initWithoutVueLib.");
      }
  
      // Register custom observers for Collection and Maps
      VueGWTObserverManager.get().registerVueGWTObserver(new CollectionObserver());
      VueGWTObserverManager.get().registerVueGWTObserver(new MapObserver());
  
      isReady = true;
  
      // Call on ready callbacks
      for (Runnable onReadyCbk : onReadyCallbacks) {
        onReadyCbk.run();
      }
      onReadyCallbacks.clear();
    }