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'com.vaadin.external.atmosphere:atmosphere-modules:2.2.3.vaadin2'
<dependency>
<groupId>com.vaadin.external.atmosphere</groupId>
<artifactId>atmosphere-modules</artifactId>
<version>2.2.3.vaadin2</version>
</dependency>
<dependency org="com.vaadin.external.atmosphere" name="atmosphere-modules" rev="2.2.3.vaadin2"/>
"com.vaadin.external.atmosphere", "atmosphere-modules", "2.2.3.vaadin2"