How to invoke methods of WebComponents in Vaadin 8

Flow
1

Hi all,

I inspired the blog: https://vaadin.com/blog/using-vaadin-elements-with-vaadin-framework
to integrate the Wizard WebComponent: https://www.webcomponents.org/element/timeu/timeu-wizard/elements/timeu-wizard
in my app Vaadin 8.

In the blog, it shows how to change Properties, listen Events of WebComponent.
But I don’t know how to call Methods of WebComponent (like decrement, increment methods of Wizard).
I tried calling: AbstractJavaScriptComponent.callFunction(“increment”), but it doesn’t work.

Thank you for your help.