Vaadin and GWT view+presenter inside jar.

Hi folks. Have few questions.
I have a gwt jar file with view and presenter. Presenter have all the logic to drive the view and handle events from the UI.
Let’s say I knew how to reuse gwt widget(make it visible at least) in my vaadin project but how to reuse presenter from my gwt project in vaadin ? Any examples?

Also. Have you actually got any vaadin-custom.gwt-maven or vaadin-custom.gwt- gradle sample project which is currently working out of the box? I googled few, one is from not realy maven project which is outdated i believe.

Many thanks.