vaadin-framework/test/servlet-containers/karaf/vaadin-karaf-bundle1/src/main/resources/com/vaadin/test/osgi/widgetset/CustomWidgetSet.gwt.xml

<module>
    <!-- Hint for WidgetSetBuilder not to automatically update the file -->
    <!-- WS Compiler: manually edited -->

    <inherits name="com.vaadin.DefaultWidgetSet" />

</module>