This add-on contains helper for Viritin Jakarta users who are upgrading to Vaadin 8 and want to do that with minimal effort. The package contains all old components and helpers that require vaadin-compatibility-server package. To use them, you'll need to replace all package names so that for example MTextField compatible with v7 stuff is imported from org.vaadin.viritinv7.fields instead of org.vaadin.viritin.fields. Note, although this artifact is Apache 2 licensed, it requires to use Vaadin 8.18 or newer, which is requiring Vaadin 8 Extended Maintenance subscription, see more https://vaadin.com/vaadin-8-extended-maintenance