How to use the @ngxs/form-plugin.UpdateFormValue function in @ngxs/form-plugin

dismiss(data?: any) {
    // Using the injected ModalController this page
    // can "dismiss" itself and pass back data.
    // console.log('dismiss', data);
    if (this.navParams.data.option === 'add') {
      this.store.dispatch([
        new UpdateFormValue({
          value: data,
          path: 'catalog.movieForm'
        }),
        new UpdateFormStatus({
          status: 'PENDING',
          path: 'catalog.movieForm'
        })
      ]);
    }
    this.modalCtrl.dismiss(data);
  }

clearMovieForm() {
    console.log('clearMovieForm');
    this.movieForm.reset();
    this.store.dispatch([
      new UpdateFormValue({
        value: this.emptyMovie,
        path: 'catalog.movieForm'
      }),
      new UpdateFormStatus({
        status: '',
        path: 'catalog.movieForm'
      })
    ]);
  }

clearForm(path: string, value: any) {
        this.store.dispatch(new UpdateFormValue({ value, path }));
        this.store.dispatch(new UpdateFormDirty({ dirty: false, path }));
      }
}

setValue(val) {
    this.store.dispatch(
      new UpdateFormValue({
        value: {toppings: val, crust: 'thin'},
        path: 'todos.pizza'
      })
    );
  }