<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-push</artifactId>
<version>8.25.0</version>
</dependency>
<parent> <groupId>com.vaadin</groupId> <artifactId>vaadin-root</artifactId> <version>8.25.0</version> </parent>
compile
|-- com.vaadin.external.atmosphere:atmosphere-runtime:2.4.30.vaadin6
provided
|-- com.vaadin.external.atmosphere.client:javascript:2.3.2.vaadin2