LoadingController synchronous

In Ionic 3 I have used the LoadingController after each button got clicked, so that the button was “blocked” for more requests and the app user can see “the process is working…”. In Ionic 4 the LoadingController is asnychronous. So i can’t use it in this way, any tricks what I could do?

  async presentLoading(text) {
   this.loading = await this.loadingCtrl.create({
      message: text,
      duration: 40000
    await this.loading.present();

    const { role, data } = await this.loading.onDidDismiss();

    console.log('Loading dismissed!');