What happened to com.vaadin.application?
<p>Currently I need to build a awfully old project. After a few frustrating hours I decided to update the pom.xml to a state-of-the-art one. Of course I've changed the vaadin version while doing so. I've raised it from 6.8.12 to 7.6.7. </p>

<p>Not suprprisingly I've a lot of "cannot be resolved to a type" errors now. One of them is "Application cannot be resolved to a type." The import comes from "com.vaadin.application". I've never heard of this class and can find barely any information. What happend to it?</p>